Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
mai hoi » mai khoi, dai hoi, lai hoi
lai hoa » dai hoa, loai hoc
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
vi cua » vai cua, di cua

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 ((mai hoi) or (lai hoa)). hieu viec cac xuc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang ((mai hoi) OR (lai hoa)). hieu viec cac xuc van hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang ((mai hoi) or (lai hoa)). hieu viec cac xuc van hanh vi cua viet*.