Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh cat » hanh cac, hanh luat, nhanh cay
hieu va » lieu va
nang ma » tang ma, sang ma, nang cao
cat cua » chat cua, ca cua, mat cua
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
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 hoi. ((hieu va) OR (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 hoi. ((hieu va) OR (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 hoi. ((hieu va) OR (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 hoi. ((hieu va) OR (hieu qua)) cham ((luc va) or (loc va)) hanh cat cua triet*.