Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
va nang » van nang, da nang, cam nang
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
luc van » luoc van, luu van, duc van
vai cua » dai cua, hai cua, lai cua
2 nang » v nang

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 ((2 nang) or (va nang)) xa hoi. hieu va cac luc van hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((2 nang) OR (va nang)) xa hoi. hieu va cac luc van hanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((2 nang) or (va nang)) xa hoi. hieu va cac luc van hanh vai cua triet*.