Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tru nang » tra nang, truc nano, thi nang
tri nang » thi nang, tra nang, tri bang
va danh » va dinh, va dan, va hanh
chua te » chua tu, chua xe, chuan ted
danh va » doanh va, hanh va, anh va
te sach » toc sach
cao duc » dao duc, cao suc, giao duc
van cao » van dao, van bao, van hao
cua te » cua tu

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 ((tru nang) or (tri nang)) xa hoi. hieu van cao duc va danh va ((chua te) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tru nang) OR (tri nang)) xa hoi. hieu van cao duc va danh va ((chua te) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tru nang) or (tri nang)) xa hoi. hieu van cao duc va danh va ((chua te) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ((tru nang) or (tri nang)) xa hoi. hieu van cao duc va danh va ((chua te) OR (cua te))*.