Perhaps you should try some spelling variations:
lieu tinh » trieu tinh, diep tinh, bien tinh
tranh cua » doanh cua, manh cua
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
tap toan » tap doan, tap quan, bai toan
toan ban » van ban
ho lieu » so lieu, co lieu, ho kieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho lieu tinh - canh tranh cua ((hang cong) or (dang cong)) tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - canh tranh cua ((hang cong) OR (dang cong)) tap toan ban.
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - canh tranh cua ((hang cong) or (dang cong)) tap toan ban*.