Perhaps you should try some spelling variations:
thang thanh » tang thanh, thanh thanh, thong thanh
hieu quang » thieu quang, hieu quan, hieu qua
thang manh » thanh anh, hoang manh, thong mang
hieu lang » chieu sang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
cua cang » cua cong, cua dang, cua hang
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (hieu quang)) - canh tranh cua cang ((thang manh) OR (thang thanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (hieu quang)) - canh tranh cua cang ((thang manh) OR (thang thanh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu lang) or (hieu quang)) - canh tranh cua cang ((thang manh) OR (thang thanh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (hieu quang)) - canh tranh cua cang ((thang manh) OR (thang thanh)) toan ban*.