Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tieu tinh » trieu tinh, tieu trinh, lieu tinh
tranh cam » trinh cam, tranh cac, tranh cai
dang cong » dung cong
pham toan » pham tuan, pham tan, phap toan
cam dang » cao dang, cam nang, cac dang
bai toan » bai tap
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 tieu tinh - hanh tranh cam dang cong ((((ty toan) or (pham toan))) or (bai toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - hanh tranh cam dang cong ((((ty toan) OR (pham toan))) OR (bai toan)) ban.
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - hanh tranh cam dang cong ((((ty toan) or (pham toan))) or (bai toan)) ban*.