Nws yog ib qho tseem ceeb kom paub qhov loj ntawm lub raj mis uas yuav siv tau, vim tias cov tshuab tsis sib xws thiab cov khoom siv tuaj yeem ua rau lub cev muaj kev ntseeg siab ntawm lub thawv. Piv txwv li, cov tshuab filling tuav lub raj mis los ntawm sab saum toj, thaum lwm tus tuav lub raj mis los ntawm sab. Qhov tseeb, cov fwj no tuaj yeem yog cov khoom lag luam loj lossis cov thawv ntim ntau. Cov tshuab ntim sib txawv yuav tsum tau hloov lub raj mis sib txawv.
Txoj kev niaj hnub no tsuas yog sau ib qho khoom thiab ib lossis ob lub thawv tshwj xeeb xwb. Rau cov chaw tsim khoom ntawm ntau yam ntaub ntawv thiab ntau hom ntim, nws yog ib qho tsim nyog yuav tsum tau yuav cov khoom siv sib xws rau ntau yam ntaub ntawv thiab ntim khoom kom tau raws li kev tsim khoom thiab siv. Thaum lub lag luam muaj kev xav tau siab thiab qis rau ntau yam khoom siv, qee yam khoom siv tsis tuaj yeem siv tag nrho, uas yog hom khoom siv khib nyiab. Tsis tas li ntawd, muaj ntau yam tsis zoo, xws li ntau yam khoom siv, thaj chaw loj ntawm kev siv, kev saib xyuas nyuaj, lub sijhawm ntev rau kev hloov pauv, kev siv zog ua haujlwm siab thiab muaj kev pheej hmoo siab.
Cov saum toj no yog kev qhia txog kev sib raug zoo ntawm lub tshuab filling rau lub thawv. Nws tuaj yeem sib xyaw nrog ntau cov khoom siv thiab ntau hom ntim, kom ib lub tshuab tuaj yeem siv tau rau ntau lub hom phiaj, txhim kho kev siv cov khoom siv, txuag nyiaj, txo qhov chaw siv, thiab hloov cov ntaub ntawv sai thiab yooj yim. muaj qhov zoo dua. Yog tias tus neeg siv khoom xaiv ntau yam khoom siv, lawv tuaj yeem kho cov khoom siv hauv lub kaus mom ntawm txhua yam khoom siv raws li qhov xav tau tiag tiag, txhawm rau hloov kho lub peev xwm ntau lawm, txhim kho kev ua haujlwm thiab txhim kho kev lag luam kev sib tw.