Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
ho chieu » theo chieu, hoc thieu, doi chieu
lan hung » luan chung, lan phuong, lan thuong
van hung » van dung, manh hung, van duong
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan

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

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