Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
hanh hoi » hanh thoi, hanh noi, hanh hoa
lam duoc » nam duoc, luat duoc, lam thuoc
hoi cua » hoi chuc
va hanh » van hanh, va thanh, va danh
duoc va » nuoc va, duc va, duoc ma
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tang ma » mang may, tang van
nang xa » nang x, lang xa, nang ma
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu ((nang xa) or (tang ma)) hoi. ((hieu van) or (thien van)) lam duoc va hanh hoi cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu ((nang xa) OR (tang ma)) hoi. ((hieu van) OR (thien van)) lam duoc va hanh hoi cua su.
• Adding a wildcard symbol may retrieve word variants: tu sach tu ((nang xa) or (tang ma)) hoi. ((hieu van) or (thien van)) lam duoc va hanh hoi cua su*.