Perhaps you should try some spelling variations:
ve triet » va trien, su triet
dung sai » dung tai, dung va, dung dat
hieu van » hieu va, thien van, lieu va
te sach » toc sach
va dung » van dung, va duong, vat dung
van lam » van nam
lam luc » lao luc, lam duoc
van hoi » van hoa, van hoc, van hoe
ky lang » ky dang, ky tang, tay lang
luc va » duc va, tuc va, loc va
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ky lang) or (ky nang)) van hoi. hieu van lam luc va dung sai ((ve triet) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky nang)) van hoi. hieu van lam luc va dung sai ((ve triet) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (ky nang)) van hoi. hieu van lam luc va dung sai ((ve triet) or (cua su))*.