Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va
thi toc » thi tac, thi goc, thi loc
danh va » doanh va, anh va, dan va
hanh va » hang va, hanh vi
toc va » hoc va, toc ta, tuc va
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang x hoi. ((hieu va) or (hieu qua)) thi toc va ((danh va) OR (hanh va)) cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. ((hieu va) OR (hieu qua)) thi toc va ((danh va) OR (hanh va)) cau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. ((hieu va) or (hieu qua)) thi toc va ((danh va) OR (hanh va)) cau triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. ((hieu va) or (hieu qua)) thi toc va ((danh va) OR (hanh va)) cau triet*.