Perhaps you should try some spelling variations:
xach tay » canh tay
nam thuc » nam thuoc, nam thu, nam tu
vat dung » van dung, va dung, viet dung
dung doi » huong doi, dung tai, dung co
nang xa » nang x, lang xa, nang ma
doi cuu » doi cua, doi cuoc
cuu tre » cua 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 ((xach tay) or (sach y)) nang xa hoi. hieu qua ((nam thuc) OR (am thuc)) vat dung doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((xach tay) OR (sach y)) nang xa hoi. hieu qua ((nam thuc) OR (am thuc)) vat dung doi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((xach tay) or (sach y)) nang xa hoi. hieu qua ((nam thuc) OR (am thuc)) vat dung doi cuu tre*".