Perhaps you should try some spelling variations:
hieu van » thien van, lieu va
duc tuan » duc thuan, duc tan, duc toan
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
y nang » ky nang, ly nang, v nang
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua
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 y nang xa hoi. ((((hieu ve) or (hieu van))) or (hieu va)) cao duc tuan anh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. ((((hieu ve) OR (hieu van))) OR (hieu va)) cao duc tuan anh vi cua te.
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. ((((hieu ve) or (hieu van))) or (hieu va)) cao duc tuan anh vi cua te*.