Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
qua cac » cua cac
cac dac » cac dan, cac dai, cac bac
dan vat » dang vat, van vat, dan va
vat cua » mat cua, bat cua, dat cua
cua tre » cua te, cuu tre, cua triet
dac xa » tac xa, cac xa, dan xa
xa dan » ca dan, xa dai, va dan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky tang xa hoi. hieu qua cac dac xa dan vat cua tre~.
• Adding a wildcard symbol may retrieve word variants: te sach ky tang xa hoi. hieu qua cac dac xa dan vat cua tre*.