Perhaps you should try some spelling variations:
dung doi » huong doi, dung tai, dung co
vat dung » van dung, va dung, viet dung
tuc vat » thuc vat, tuc va, tuc hat
cua tre » cua te, cua triet, dua tren
cam tuc » cam xuc, cam tu, nam thuc
sach ty » sach tu, sach thu, xach tay
qua cam » qua cham, qua cac, qua ca
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) or (sach y)) nang xa hoi. hieu qua cam tuc vat dung doi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) nang xa hoi. hieu qua cam tuc vat dung doi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) or (sach y)) nang xa hoi. hieu qua cam tuc vat dung doi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach y)) nang xa hoi. hieu qua cam tuc vat dung doi ((cua tre) OR (cuu tre))*.