Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
chua hang » cua hang, chua nang, chua bang
chua xang » chua nang, chuc nang, chu bang
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chau tinh) or (lieu tinh)) - canh tranh ((chua hang) OR (chua xang)) cong tap toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chau tinh) OR (lieu tinh)) - canh tranh ((chua hang) OR (chua xang)) cong tap toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chau tinh) or (lieu tinh)) - canh tranh ((chua hang) OR (chua xang)) cong tap toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chau tinh) or (lieu tinh)) - canh tranh ((chua hang) OR (chua xang)) cong tap toan tap*.