Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien cac » hien cac, thien cau, thieu cac
tang van » dang van, hoang van, trong van
su sach » so sach, vu sach
van hoi » van hoa, van hoc, van hoe
tuc van » thuc van, truc van, duc van
y tang » ky tang, 6 tang, 7 tang
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di 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: su sach y tang van hoi. hieu thien cac ((tuc van) or (tuc va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y tang van hoi. hieu thien cac ((tuc van) OR (tuc va)) hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: su sach y tang van hoi. hieu thien cac ((tuc van) or (tuc va)) hanh vi cua te*.