Perhaps you should try some spelling variations:
trinh luong » trinh duong, trinh huong, trinh xuong
canh trinh » canh tranh, hanh trinh, canh tinh
luong cong » dung cong, trong cong, cong cong
thi hanh » thi thanh
dong tac » cong tac, dong tai, dong bac
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
doi thi » doi thoi, do thi, doi khi

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 hanh - canh trinh luong cong dong tac toan cau~.
• Adding a wildcard symbol may retrieve word variants: doi thi hanh - canh trinh luong cong dong tac toan cau*.