Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
theo chieu » theo tieu, ho chieu, thi chieu
duong manh » duong van
cong thanh » dong thanh, cong trinh, cong tan
trinh qua » trinh quan, trinh cua, trinh quang
qua trong » quan trong, qua trinh, qua song
theo chu » cho chu, chao chu, theo yeu
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: ((theo chieu) OR (theo chu)) nang - canh trinh qua trong ((duong manh) or (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) nang - canh trinh qua trong ((duong manh) OR (cong thanh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) nang - canh trinh qua trong ((duong manh) or (cong thanh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) nang - canh trinh qua trong ((duong manh) or (cong thanh)) toan cau*.