Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
te sach » toc sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
y nang » ky nang, ly nang, v nang
xuc va » tuc va, luc va, xac va
dan vi » doan vi, dan va, gan vi
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 cham ((xuc va) or (duc va)) ((dan vi) or (don vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu va cham ((xuc va) OR (duc va)) ((dan vi) OR (don vi)) va triet.
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu va cham ((xuc va) or (duc va)) ((dan vi) or (don vi)) va triet*.