Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
hanh va » hang va, hanh vi
luc van » luoc van, luu van, duc van
nam luc » nang luc, nhan luc, nam thuc
va cua » va chua, via cua, ca cua
va nam » van nam, ha nam, va nay
o hoi » co hoi, o hai, o hoa
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((do sanh) or (te sach)) ky nang ((o hoi) OR (o hoc)). lieu va nam luc van hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((do sanh) OR (te sach)) ky nang ((o hoi) OR (o hoc)). lieu va nam luc van hanh va cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((do sanh) or (te sach)) ky nang ((o hoi) OR (o hoc)). lieu va nam luc van hanh va cua triet".
• Adding a wildcard symbol may retrieve word variants: ((do sanh) or (te sach)) ky nang ((o hoi) OR (o hoc)). lieu va nam luc van hanh va cua triet*.