Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tang luan » dung luan
dung cong » dung trong
mang cua » manh cua, dung cua, ban cua
cong tac » cong ty
tac tren » rac tren, tai tren, tap tren
tren cau » tren ca, tren cay, tren tau

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 sach - anh ((tang luan) or (mang cua)) dung cong tac tren cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - anh ((tang luan) OR (mang cua)) dung cong tac tren cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - anh ((tang luan) or (mang cua)) dung cong tac tren cau*.