Perhaps you should try some spelling variations:
cong ngang » cong nhan, cong quang, cong lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong vang » cong lang, cong quang, cong san
toc hieu » toc thieu, doc hieu, hoc thieu
tranh he » trinh he, tranh ha, tinh he
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu manh - canh tranh he thong ((cong vang) OR (cong ngang)) ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu manh - canh tranh he thong ((cong vang) OR (cong ngang)) ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc hieu manh - canh tranh he thong ((cong vang) OR (cong ngang)) ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: toc hieu manh - canh tranh he thong ((cong vang) OR (cong ngang)) ((toan cau) or (toan cao))*.