Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham tuc » nham thuc, pham thuc, tham thuc
van hang » van khang, van hoang, van thang
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
va hang » va nang, va lang, va hanh
doi cua » dai cua, hoi cua
di cua » dai cua, de cua, do cua

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 tu nang xa hoi. hieu qua cham tuc ((va hang) OR (van hang)) ((di cua) or (doi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang xa hoi. hieu qua cham tuc ((va hang) OR (van hang)) ((di cua) OR (doi cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang xa hoi. hieu qua cham tuc ((va hang) OR (van hang)) ((di cua) or (doi cua)) te*".