Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu tinh » trieu tinh, lieu tinh, chau tinh
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
ho chieu » theo chieu, hoc thieu, doi chieu
van manh » van minh, van anh, van hanh
tan toan » tap toan, van toan, dan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu tinh - ((canh manh) or (van manh)) cua nhung cong ((tan toan) OR (tan tran)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - ((canh manh) OR (van manh)) cua nhung cong ((tan toan) OR (tan tran)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - ((canh manh) or (van manh)) cua nhung cong ((tan toan) OR (tan tran)) cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - ((canh manh) or (van manh)) cua nhung cong ((tan toan) OR (tan tran)) cao*.