Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hanh lai » hanh lam, hanh tai, thanh lap
nhan tuc » nhan thuc, nhan luc, nhanh thuc
va hanh » van hanh, va thanh, va danh
vu nhan » cu nhan, vu ngan, tu nhan
hieu vu » hieu va, hieu ve, hieu su
su sach » so sach
vu sach » vu bach, vu khach
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
tuc va » thuc va, truc va, tuc xa

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