Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
te sach » toc sach
hieu va » lieu va
y nang » ky nang, ly nang, v nang
xuc va » tuc va, luc va, xac va
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
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 y nang x hoi. ((hieu va) OR (hieu qua)) cham ((xuc va) or (duc va)) dan vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. ((hieu va) OR (hieu qua)) cham ((xuc va) OR (duc va)) dan vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. ((hieu va) OR (hieu qua)) cham ((xuc va) or (duc va)) dan vi cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. ((hieu va) OR (hieu qua)) cham ((xuc va) or (duc va)) dan vi cua triet*.