Perhaps you should try some spelling variations:
chai tinh » chau tinh, thai tinh, cham tinh
lang cong » dang cong, hang cong, lang dong
bang cong » dang cong, bang song, hang cong
chi tinh » chi minh, chi binh, cha tinh
tranh va » tranh van, trang va, trinh va
san toan » van toan, dan toan, 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: doi ((chi tinh) OR (chai tinh)) - canh tranh va ((lang cong) or (bang cong)) san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi tinh) OR (chai tinh)) - canh tranh va ((lang cong) OR (bang cong)) san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi tinh) OR (chai tinh)) - canh tranh va ((lang cong) or (bang cong)) san toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chi tinh) OR (chai tinh)) - canh tranh va ((lang cong) or (bang cong)) san toan cau*.