Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thuc vay » thuc vat, thuc day, thuc va
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang o » nang co, nang ho, nang ro
cuc te » cua te, cuc thue, cuc tieu
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 ty nang o hoi. hieu van nam thuc vay doanh tai cuc te~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hoi. hieu van nam thuc vay doanh tai cuc te*.