Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tri nang » thi nang, tra nang, tri bang
hieu van » hieu va, thien van, lieu va
truc ban » thuc ban, truc dan, truc van
ban hanh » ban hang
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
cua tre » cua te, cuu tre, dua tren

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) or (su sach)) tri nang xa hoi. hieu van cau truc ban hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) tri nang xa hoi. hieu van cau truc ban hanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) tri nang xa hoi. hieu van cau truc ban hanh vi ((cua tre) or (cua triet))*.