Perhaps you should try some spelling variations:
viet trang » viet trung, viet trong, viet thanh
nhung thoi » nhung thi, phung thi, nhung loi
biet tran » bien tran, viet tran, biet trong
trong san » trong cac, cong san, dong san
thoi que » thoi quen, thon que, thong que
san than » sang than, san thanh, ban than
que van » qua van, quy van, quyet van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: nhung thoi que van. ((biet tran) or (viet trang)) trong san than~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nhung thoi que van. ((biet tran) OR (viet trang)) trong san than.
• Adding a wildcard symbol may retrieve word variants: nhung thoi que van. ((biet tran) or (viet trang)) trong san than*.