Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu ban » hieu van, dieu ban, lieu ban
hanh di » hanh vi, hanh de, hang di
san van » tan van, luan van, tran van
sac van » cac van, sat van, tac van
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, su sach, vu khach
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 (vu sach)) ky nang ma hoi. hieu ban thanh ((sac van) OR (san van)) hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu sach)) ky nang ma hoi. hieu ban thanh ((sac van) OR (san van)) hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (vu sach)) ky nang ma hoi. hieu ban thanh ((sac van) OR (san van)) hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (vu sach)) ky nang ma hoi. hieu ban thanh ((sac van) OR (san van)) hanh di cua te*.