Perhaps you should try some spelling variations:
duc phan » dung phan, duc thang, duc phung
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 tu nang xa hoi. hieu ve cac ((duc phan) or (duc va)) hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang xa hoi. hieu ve cac ((duc phan) OR (duc va)) hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. hieu ve cac ((duc phan) or (duc va)) hanh vi cua tu*.