Perhaps you should try some spelling variations:
kinh nang » kinh mang, tinh nang, kinh hoang
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac duc » cac du, cac dac, cac nuoc
cao duc » dao duc, cao suc, giao duc
cua cu » cua chu, cua cau, cua 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 kinh nang xa hoi. ((hieu ve) or (hieu qua)) ((cac duc) OR (cao duc)) van hanh dai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach kinh nang xa hoi. ((hieu ve) OR (hieu qua)) ((cac duc) OR (cao duc)) van hanh dai cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach kinh nang xa hoi. ((hieu ve) or (hieu qua)) ((cac duc) OR (cao duc)) van hanh dai cua cu".
• Adding a wildcard symbol may retrieve word variants: te sach kinh nang xa hoi. ((hieu ve) or (hieu qua)) ((cac duc) OR (cao duc)) van hanh dai cua cu*.