Perhaps you should try some spelling variations:
thuong trong » thong trong, duong trong, thuoc trong
doanh luan » doanh nhan
hieu quan » hieu qua, lieu quan, thien quan
tranh cua » doanh cua, manh cua
trong van » trong cac
doi hieu » doi chieu, doc hieu, doi hien
ban cau » bang cau, ban can, van cau

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 quan - canh ((tranh cua) or (doanh luan)) thuong trong van ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu quan - canh ((tranh cua) OR (doanh luan)) thuong trong van ban cau.
• Adding a wildcard symbol may retrieve word variants: doi hieu quan - canh ((tranh cua) or (doanh luan)) thuong trong van ban cau*.