Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
lenh va » benh va, lanh va, lenh vi
hieu va » lieu va, hieu qua
va hoi » xa hoi, va hoc, va hoa
vi cua » vai cua, di cua
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu lenh va hoi. ((hieu van) OR (hieu va)) cam ((duc va) OR (hoc va)) hanh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: su sach tu lenh va hoi. ((hieu van) or (hieu va)) cam ((duc va) or (hoc va)) hanh vi cua te*.