Perhaps you should try some spelling variations:
chet triet » chuyen triet, thuyet triet
thanh lam » thanh lap, hanh lam, thanh nam
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat tuc » chat xuc, luat tuc, chat huu
xa thanh » va thanh, ha thanh, ta thanh
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ma hoi. hieu van chat tuc xa thanh lam ((chet triet) or ((phat OR pham) trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu van chat tuc xa thanh lam ((chet triet) OR ((phat OR pham) trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu van chat tuc xa thanh lam ((chet triet) or ((phat OR pham) trien))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu van chat tuc xa thanh lam ((chet triet) or ((phat OR pham) trien))*.