Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hanh tranh » canh tranh, hanh trinh, lanh tranh
nang cong » dang cong, bang cong, hang cong
theo yeu » theo tieu, thiet yeu, theo chu
yeu tinh » yeu tin, lieu tinh, kieu tinh
toan ban » van ban
ty toan » ly toan, tap toan, huy toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo yeu tinh - ((hanh tranh) or (hanh trang)) van ((nang cong) OR (nang song)) ty toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo yeu tinh - ((hanh tranh) OR (hanh trang)) van ((nang cong) OR (nang song)) ty toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo yeu tinh - ((hanh tranh) or (hanh trang)) van ((nang cong) OR (nang song)) ty toan ban".
• Adding a wildcard symbol may retrieve word variants: theo yeu tinh - ((hanh tranh) or (hanh trang)) van ((nang cong) OR (nang song)) ty toan ban*.