Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban danh » ban doanh, ban hanh, ban dan
cua tre » cuu tre, cua triet, dua tren
danh vi » hanh vi, dinh vi, danh di
xuc ban » duc ban, cuc ban, quoc ban
nam xuc » cam xuc, nam xua, nam thuc
tu sach » thu sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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)) ty nang o hoi. hieu van nam xuc ban danh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang o hoi. hieu van nam xuc ban danh vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang o hoi. hieu van nam xuc ban danh vi ((cua tre) or (cua te))*.