Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham truc » cau truc, nham thuc, pham thuc
thanh di » thanh doi, thanh de, thanh do
vuc nang » cuc nang, vu nang, chuc nang
truc ban » thuc ban, truc dan, truc van
ve cham » va cham, ve chat, vu cham
so sach » bo sach, co sach, hoc sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
so sanh » do sanh
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua
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) or (so sanh)) vuc nang ma hoi. hieu ve cham truc ban thanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) vuc nang ma hoi. hieu ve cham truc ban thanh di cua te.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) vuc nang ma hoi. hieu ve cham truc ban thanh di cua te*.