Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
hanh dai » hanh tai, hanh dao, vanh dai
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
y tang » ky tang, 6 tang, 5 tang
7 tang » 6 tang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((y tang) or (7 tang)) ma hoi. hieu va cham tuc va hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((y tang) OR (7 tang)) ma hoi. hieu va cham tuc va hanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: so sach ((y tang) or (7 tang)) ma hoi. hieu va cham tuc va hanh dai cua te*.