Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
nhanh lang » nhanh quang, nhanh thang, nhan dang
thong cong » trong cong, tong cong, thong thong
lanh manh » lanh tranh, lan anh, van manh
hach toan » thanh toan, manh toan
va thong » va thuong, va phuong, he thong
tac toan » tap toan, tam toan, tich toan

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 xanh - ((lanh manh) or (nhanh lang)) va thong cong ((tac toan) OR (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((lanh manh) OR (nhanh lang)) va thong cong ((tac toan) OR (hach toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - ((lanh manh) or (nhanh lang)) va thong cong ((tac toan) OR (hach toan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((lanh manh) or (nhanh lang)) va thong cong ((tac toan) OR (hach toan)) cau*.