Perhaps you should try some spelling variations:
kinh nang » kinh mang, tinh nang, kinh hoang
ban hanh » ban hang
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, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
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 ban 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 ban 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 ban hanh dai cua cu*.