Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nhan luoc » nhan luc, nhan cuoc, nhan duoc
luoc van » luoc can, luoc va, luc van
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
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)) ky nang xa hoi. ((hieu qua) or (lieu va)) nhan luoc van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. ((hieu qua) OR (lieu va)) nhan luoc van hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang xa hoi. ((hieu qua) or (lieu va)) nhan luoc van hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang xa hoi. ((hieu qua) or (lieu va)) nhan luoc van hanh vi cua triet*.