Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
quan thong » quang thong, quan trong, xuan thong
lieu tinh » trieu tinh, diep tinh, bien tinh
cong tac » cong ty
toan cao » toan ban, toan tap
co lieu » cot lieu, co hieu, so lieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co lieu tinh - ((hanh trang) OR (hanh trinh)) quan thong ((cong tac) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co lieu tinh - ((hanh trang) OR (hanh trinh)) quan thong ((cong tac) OR (cong san)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co lieu tinh - ((hanh trang) OR (hanh trinh)) quan thong ((cong tac) or (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: co lieu tinh - ((hanh trang) OR (hanh trinh)) quan thong ((cong tac) or (cong san)) toan cao*.