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
anh quang » anh xquang, anh quan, nhanh quang
cua thong » cua thuong, cua khong, cua tong
thong tac » thong cac, tuong tac, thong tai
anh tang » anh bang, anh dang, anh nang
tac toan » tap toan, tam toan, hach toan
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 - ((((anh tang) or (anh quang))) or (nhanh lang)) cua thong thong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((((anh tang) OR (anh quang))) OR (nhanh lang)) cua thong thong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((((anh tang) or (anh quang))) or (nhanh lang)) cua thong thong tac toan cao*.