Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
khia canh » kho canh, thi canh
luat cong » thuat cong, luat chung, cua cong
doi khia » doi khi, noi khoa, hoi khoa
dong tac » cong tac, dong tai, dong bac
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi khia canh - canh trinh luat cong dong tac toan cau~.
• Adding a wildcard symbol may retrieve word variants: doi khia canh - canh trinh luat cong dong tac toan cau*.