Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh vat » trinh van, trinh luat, sinh vat
hang cong » dang cong, hang nong, bang cong
dung cong » dung trong
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan
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 - hanh trinh vat ((hang cong) or (dung cong)) ((tan toan) or (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - hanh trinh vat ((hang cong) OR (dung cong)) ((tan toan) OR (tap toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - hanh trinh vat ((hang cong) or (dung cong)) ((tan toan) or (tap toan)) cau*.