Perhaps you should try some spelling variations:
thanh tiep » thanh hiep, thanh tien, thanh thieu
ban thanh » ban hanh, ban hang
lam duoc » nam duoc, luat duoc, lam thuoc
hieu van » hieu va, thien van, lieu va
su triet » su viet, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lam xuc » cam xuc
nang xa » nang x, lang xa, nang ma
su tien » su kien, su hien, tu tieng

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 ((lam xuc) OR (lam duoc)) ban thanh tiep ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van ((lam xuc) OR (lam duoc)) ban thanh tiep ((su triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu van ((lam xuc) OR (lam duoc)) ban thanh tiep ((su triet) or (su tien))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van ((lam xuc) OR (lam duoc)) ban thanh tiep ((su triet) or (su tien))*.