Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
doanh cua » doanh luan
dung cong » dung trong
manh cua » ban cua
cong tac » cong ty
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: hoc chieu xanh - hanh ((((tranh cua) OR (doanh cua))) or (manh cua)) dung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((((tranh cua) OR (doanh cua))) OR (manh cua)) dung cong tac toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh ((((tranh cua) OR (doanh cua))) or (manh cua)) dung cong tac toan cao*".