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, nhanh dong
nhan dang » nhan dan, phan dang, tran dang
qua dung » quang dung, su dung, qua song
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
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 xanh - ((nhanh lang) or (nhan dang)) qua dung ((cong tap) OR (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((nhanh lang) OR (nhan dang)) qua dung ((cong tap) OR (cong tac)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - ((nhanh lang) or (nhan dang)) qua dung ((cong tap) OR (cong tac)) toan cao".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((nhanh lang) or (nhan dang)) qua dung ((cong tap) OR (cong tac)) toan cao*.