Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh loi » thanh hoa, thanh hai, thanh lap
thanh doi » thanh moi, thanh do, thanh hoai
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cau luc » cau truc, cau phuc
luc va » duc va, tuc va, loc va

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 ky nang xa hoi. ((hieu ve) or (lieu va)) cau luc va ((thanh doi) OR (thanh loi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu ve) OR (lieu va)) cau luc va ((thanh doi) OR (thanh loi)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((hieu ve) or (lieu va)) cau luc va ((thanh doi) OR (thanh loi)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu ve) or (lieu va)) cau luc va ((thanh doi) OR (thanh loi)) cua triet*.