Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
chieu xanh » chieu sach, chieu sang, hieu manh
chieu tinh » trieu tinh, lieu tinh, chau tinh
tranh chua » tranh cua, tranh chap, trinh chu
bang cong » dang cong, bang song, hang cong
cong tac » cong ty
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: ho ((chieu xanh) or (chieu tinh)) - canh ((tranh chua) OR (trinh chuan)) bang cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu tinh)) - canh ((tranh chua) OR (trinh chuan)) bang cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu tinh)) - canh ((tranh chua) OR (trinh chuan)) bang cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu tinh)) - canh ((tranh chua) OR (trinh chuan)) bang cong tac toan cau*.