Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
vang thanh » van thanh, dang thanh, tang thanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong vang » cong lang, cong quang, cong ngang
thanh ban » thanh san, thanh van, thanh bac
hoc thi » hoc thai, hoc tai, hoc chi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thi) or (toc thai)) thanh - canh tranh cua nhung cong vang thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thi) OR (toc thai)) thanh - canh tranh cua nhung cong vang thanh ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thi) or (toc thai)) thanh - canh tranh cua nhung cong vang thanh ban*.