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