Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
tay lang » tai lang, tay tang, tay quang
nhan luc » nang luc
luc van » luoc van, luu van, duc van
tu sach » thu sach, te sach, tu cach
lang xa » lang ha, dang xay, lang van
su sach » so sach, vu sach
hieu va » hieu qua
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) or (su sach)) tay lang xa hoi. ((hieu va) or (lieu va)) nhan luc van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) tay lang xa hoi. ((hieu va) OR (lieu va)) nhan luc van hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) tay lang xa hoi. ((hieu va) or (lieu va)) nhan luc van hanh vi cua triet*.