Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
tran doanh » toan doanh, trai doanh, tran danh
dong cong » duong cong, dang cong, cong cong
dung cong » dung trong
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man
khi anh » thi anh, chi anh, khia canh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi khi anh - ((doanh doanh) or (tran doanh)) cua ((dong cong) OR (dung cong)) dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi khi anh - ((doanh doanh) OR (tran doanh)) cua ((dong cong) OR (dung cong)) dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi khi anh - ((doanh doanh) or (tran doanh)) cua ((dong cong) OR (dung cong)) dan than ban".
• Adding a wildcard symbol may retrieve word variants: doi khi anh - ((doanh doanh) or (tran doanh)) cua ((dong cong) OR (dung cong)) dan than ban*.