Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham tuc » nham thuc, pham thuc, tham thuc
vat dung » van dung, viet dung, mat duong
sach ty » sach tu, sach thu, xach tay
va dung » van dung, va duong, va ung
doi cua » dai cua, hoi cua
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 (sach y)) nang x hoi. hieu qua cham tuc ((vat dung) OR (va dung)) doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) nang x hoi. hieu qua cham tuc ((vat dung) OR (va dung)) doi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) or (sach y)) nang x hoi. hieu qua cham tuc ((vat dung) OR (va dung)) doi cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach y)) nang x hoi. hieu qua cham tuc ((vat dung) OR (va dung)) doi cua te*.