Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
hanh mang » nhanh mang, hanh trang, nhanh lang
bang cong » dang cong, hang cong, dung cong
bang song » nang song
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((hanh mang) or (hanh trinh)) cua ((bang cong) OR (bang song)) san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((hanh mang) OR (hanh trinh)) cua ((bang cong) OR (bang song)) san toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((hanh mang) or (hanh trinh)) cua ((bang cong) OR (bang song)) san toan cau*".