Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
nhung cong » dung cong, hang cong, nhung don
lieu tinh » trieu tinh, diep tinh
bien tinh » bi tinh, yen tinh, diep tinh
tranh ve » trinh ve, thanh ve, tranh va
dan toan » van toan, dan than, manh toan
toan cau » 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: hoc ((lieu tinh) OR (bien tinh)) - canh tranh ve ((nhung cong) or (thong cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((lieu tinh) OR (bien tinh)) - canh tranh ve ((nhung cong) OR (thong cong)) dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((lieu tinh) OR (bien tinh)) - canh tranh ve ((nhung cong) or (thong cong)) dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((lieu tinh) OR (bien tinh)) - canh tranh ve ((nhung cong) or (thong cong)) dan toan cau*.