Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh cat » hanh cac, hanh luat, nhanh cay
qua cham » qua hai, qua cac, va cham
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
cat cua » chat cua, ca cua, mat cua
su sach » so sach, vu sach
luc va » duc va, tuc va
loc va » hoc 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 (tang ma)) hoi. hieu qua cham ((luc va) or (loc va)) hanh cat cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang ma) OR (tang ma)) hoi. hieu qua cham ((luc va) OR (loc va)) hanh cat cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang ma) OR (tang ma)) hoi. hieu qua cham ((luc va) or (loc va)) hanh cat cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang ma) OR (tang ma)) hoi. hieu qua cham ((luc va) or (loc va)) hanh cat cua triet*.