Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
tham luc » than luc, tham nuoc, tham thuc
hieu va » lieu va, hieu qua
tai cuu » tai cuc, tai buu, tai cua
va hanh » van hanh, va thanh, va danh
va tham » van tham, va cham, va thanh
cuu tre » cua tre, cau tren, cau treo
van hoc » van hoa
van hoi » van hoa, van hoe, van loi
ky lang » ky dang, ky tang, tay lang
luc va » duc va, tuc va, loc va
te san » te ban, ke san, tu san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te san ((ky lang) or (ky nang)) ((van hoi) or (van hoc)). hieu va tham luc va hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ((ky lang) OR (ky nang)) ((van hoi) OR (van hoc)). hieu va tham luc va hanh tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: te san ((ky lang) or (ky nang)) ((van hoi) or (van hoc)). hieu va tham luc va hanh tai cuu tre*.