Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua trong » cua truong, cua trung, qua trong
hach toan » manh toan
doc hieu » toc thieu, hoc thieu, hoc hien
hieu ca » hieu cac, hieu cua, hieu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu ca - hanh tranh cua trong cong ((hach toan) or (thanh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu ca - hanh tranh cua trong cong ((hach toan) OR (thanh toan)) cau*.