Perhaps you should try some spelling variations:
tcanh tranh » thanh thanh, can tranh, lanh tranh
trong quang » truong quang, trong quan, thong quan
thong quang » thong quan, thong qua, luong quang
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua hoang » cua hang, quan hoang, tuan hoang
doc hieu » toc thieu, hoc thieu, hoc hien
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: doc hieu manh - ((canh tranh) or (tcanh tranh)) cua hoang ((trong quang) OR (thong quang)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - ((canh tranh) OR (tcanh tranh)) cua hoang ((trong quang) OR (thong quang)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - ((canh tranh) or (tcanh tranh)) cua hoang ((trong quang) OR (thong quang)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - ((canh tranh) or (tcanh tranh)) cua hoang ((trong quang) OR (thong quang)) toan ban*.