Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
lieu tinh » trieu tinh, diep tinh, bien tinh
van hang » van khang, van hoang, van thang
cong tac » cong ty
toan cao » toan ban, toan tap
ho lieu » so lieu, co lieu, ho kieu
va lang » va nang, hoa lang

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 ((van hang) or (va lang)) ((cong san) OR (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - hanh trinh ((van hang) OR (va lang)) ((cong san) OR (cong tac)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - hanh trinh ((van hang) or (va lang)) ((cong san) OR (cong tac)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - hanh trinh ((van hang) or (va lang)) ((cong san) OR (cong tac)) toan cao*.