Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
te cach » ve cach, te sach, tu cach
vai cua » dai cua, hai cua, bai cua
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
cac duc » cac du, cac dac, cac nuoc
lai cua » dai cua, hai cua, lai chau
cach tu » cach thuc
cao duc » dao duc, cao suc, giao duc

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cach tu nang xa hoi. hieu van ((cac duc) or (cao duc)) van hanh ((vai cua) OR (lai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cach tu nang xa hoi. hieu van ((cac duc) OR (cao duc)) van hanh ((vai cua) OR (lai cua)) tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cach tu nang xa hoi. hieu van ((cac duc) or (cao duc)) van hanh ((vai cua) OR (lai cua)) tu*".