Perhaps you should try some spelling variations:
nhung trong » hung trong, nhung tuong, thuong trong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
trong van » trong cac
doc hieu » toc thieu, hoc thieu, hoc hien
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
van cau » van dau, van hau, van chat

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

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