Perhaps you should try some spelling variations:
van phan » van phong, van thanh, luan phan
dieu cua » dieu tra
thu xac » thau xay
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
cac suc » cao suc, cac nuoc, cac cuoc
va phan » va phat, va phap, hoa phan
xac ky » cac ky, sac ky, bac ky
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: thu xac ky nang xa hoi. ((hieu ve) or (hieu va)) cac suc ((va phan) OR (van phan)) dieu cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu xac ky nang xa hoi. ((hieu ve) OR (hieu va)) cac suc ((va phan) OR (van phan)) dieu cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu xac ky nang xa hoi. ((hieu ve) or (hieu va)) cac suc ((va phan) OR (van phan)) dieu cua tu".
• Adding a wildcard symbol may retrieve word variants: thu xac ky nang xa hoi. ((hieu ve) or (hieu va)) cac suc ((va phan) OR (van phan)) dieu cua tu*.