Perhaps you should try some spelling variations:
tranh han » tranh hang, trinh han, tranh ban
thi oanh » thi hanh, thi thanh, thi nang
ung cong » dung cong, luong cong, duong cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
thi anh » thi hanh, thi thanh, thich anh
han ung » phan ung, chan dung, han tong

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((thi oanh) or (thi anh)) - canh tranh han ung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((thi oanh) OR (thi anh)) - canh tranh han ung cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: doi ((thi oanh) or (thi anh)) - canh tranh han ung cong tan toan cao*.