Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
than luc » nhan luc, than duc, thanh luu
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
va than » va thanh, van than, va phan
luc van » luoc van, luu van, duc van
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y nang) or (v nang)) xa hoi. hieu va than luc van thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. hieu va than luc van thanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) xa hoi. hieu va than luc van thanh vi cua triet*.