Perhaps you should try some spelling variations:
dung doi » huong doi, dung tai, dung co
xach tay » canh tay
vat dung » van dung, va dung, viet dung
qua cac » cua cac
doi cua » dai cua, hoi cua
tuc vat » thuc vat, tuc va, tuc hat
cac tuc » cac toc, cac tu, cac tac
sach ty » sach tu, sach thu, sach hay
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 (xach tay))) or (sach y)) nang x hoi. hieu qua cac tuc vat dung doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((sach ty) OR (xach tay))) OR (sach y)) nang x hoi. hieu qua cac tuc vat dung doi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((((sach ty) OR (xach tay))) or (sach y)) nang x hoi. hieu qua cac tuc vat dung doi cua te".
• Adding a wildcard symbol may retrieve word variants: su ((((sach ty) OR (xach tay))) or (sach y)) nang x hoi. hieu qua cac tuc vat dung doi cua te*.