Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach, vu sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu vu » hieu va, hieu ve, hieu su
vu nhan » cu nhan, vu ngan, tu nhan
sach v » sach va, sach y, sach 2
luc va » tuc va, loc va

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 v ((nang xa) OR (lang xa)) hoi. hieu vu nhan ((luc va) or (duc va)) hanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v ((nang xa) OR (lang xa)) hoi. hieu vu nhan ((luc va) OR (duc va)) hanh lai chau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v ((nang xa) OR (lang xa)) hoi. hieu vu nhan ((luc va) or (duc va)) hanh lai chau triet".
• Adding a wildcard symbol may retrieve word variants: su sach v ((nang xa) OR (lang xa)) hoi. hieu vu nhan ((luc va) or (duc va)) hanh lai chau triet*.