Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
chiet tach » chieu sach
hanh hanh » hanh han, xanh hanh, nhanh thanh
dung tinh » dang tinh, dung ninh, dung tin
toan tap » toan ban
hanh va » hang va, hanh vi
ung » cung
dung » dcung

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) or (chiet tach)) - hanh hanh va ung dung tinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chiet tach)) - hanh hanh va ung dung tinh toan tap.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chiet tach)) - hanh hanh va ung dung tinh toan tap*.