Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
hoc thieu » toc thieu, hoc hien
cong cong » cong dong, trong cong, dung cong
ho chieu » theo chieu, doi chieu, mot chieu
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cao » toan ban, toan tap

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) OR (hoc thieu)) sang - ((hanh tranh) or (canh tranh)) thu cong cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sang - ((hanh tranh) OR (canh tranh)) thu cong cong tap toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sang - ((hanh tranh) or (canh tranh)) thu cong cong tap toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sang - ((hanh tranh) or (canh tranh)) thu cong cong tap toan cao*.