Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hanh lai » hanh lam, hanh tai, thanh lap
truc va » thuc va, thuc vat, trung va
su sach » so sach, vu sach
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
vu nhan » cu nhan, vu ngan, tu nhan
tuc va » thuc va, tuc xa, duc 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 y ((nang ma) or (lang xa)) hoi. hieu vu nhan ((tuc va) OR (truc va)) hanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang ma) OR (lang xa)) hoi. hieu vu nhan ((tuc va) OR (truc va)) hanh lai chau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang ma) or (lang xa)) hoi. hieu vu nhan ((tuc va) OR (truc va)) hanh lai chau triet".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang ma) or (lang xa)) hoi. hieu vu nhan ((tuc va) OR (truc va)) hanh lai chau triet*.