Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
nhan duc » nhan duoc, nhan luc, phan duc
hanh tai » thanh tai, hang tai, han tai
hanh lai » hanh lam, thanh lap, thanh loi
su sach » so sach, vu sach
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
vu nhan » cu nhan, vu ngan, tu nhan

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