Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
tru nang » tra nang, tri nang, truc nano
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
nam cuc » nam cac, nam cua, nam thuc
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, te sach, tu cach

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