Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
thanh van » thanh san, thanh toan, thanh phan
nam thuc » nam thuoc, am thuc, nam thu
thuc dan » thuc hanh, hoc dan, thuc vat
hau treo » cau treo, cau theo, dau tren
hieu va » lieu va, hieu qua
van hau » van ha, van hai, van dau
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay
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 sac ky nang ((o hoi) or (co hoc)). hieu va nam thuc dan thanh van hau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((o hoi) OR (co hoc)). hieu va nam thuc dan thanh van hau treo.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((o hoi) or (co hoc)). hieu va nam thuc dan thanh van hau treo*.