Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
cao hoi » cau hoi, co hoi, cao hoc
hieu va » hieu qua
cac luc » cau luc, coc luc, cac nuoc
luc van » luoc van, luu van, duc van
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: ((thu sach) or (vu sach)) ky nang cao hoi. ((hieu va) or (lieu va)) cac luc van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (vu sach)) ky nang cao hoi. ((hieu va) OR (lieu va)) cac luc van hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (vu sach)) ky nang cao hoi. ((hieu va) or (lieu va)) cac luc van hanh vi cua triet*.