Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
thanh lap » thanh san, phan lap, thanh hai
hieu van » hieu va, thien van, hieu ve
hanh lam » hanh kem, hanh va, dinh lam
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, luc 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 van) OR (lieu va)) bac xuc va ((hanh lam) or (thanh lap)) chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu van) OR (lieu va)) bac xuc va ((hanh lam) OR (thanh lap)) chat triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((hieu van) OR (lieu va)) bac xuc va ((hanh lam) or (thanh lap)) chat triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu van) OR (lieu va)) bac xuc va ((hanh lam) or (thanh lap)) chat triet*.