Perhaps you should try some spelling variations:
hanh dieu » han dieu, hinh dieu, hoang dieu
van hanh » van thanh, ban hanh, van anh
dieu cua » dieu tra
sach va » sach xa, sach ha, sach dao
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hau luc » hau loc, cau luc, nhan luc
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
sach v » sach y, sach 2, sach vay
va hau » van hau, va chau, vat hau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach v) or (sach va)) nang xa hoi. hieu va hau luc van hanh dieu cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach va)) nang xa hoi. hieu va hau luc van hanh dieu cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach va)) nang xa hoi. hieu va hau luc van hanh dieu cua tre*.