Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
phan trien » phat trien, phan tien, phan truyen
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat tuc » chat xuc, luat tuc, chat huu
hanh lam » thanh lap, hanh kem, hanh va
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
xa hanh » xa thanh, xa khanh, va hanh
y nang » ky nang, ly nang, v nang

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 xa hoi. hieu van chat tuc xa hanh lam ((chat triet) or (phan trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van chat tuc xa hanh lam ((chat triet) OR (phan trien)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu van chat tuc xa hanh lam ((chat triet) or (phan trien))*.