Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
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
va cam » va cham, va cac, va cao
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 cam 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 cam 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 cam tuc va hanh dai cua te*.