Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
khong cong » thong cong, khong cang, chong cong
trung hoc » trung quoc
tien anh » tieng anh, tien manh, dien anh
trang ha » trang va, trung ha, tang ha
cong san » cong tac
san van » tan van, luan van, tran van

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) or (tien anh)) - hanh ((trang ha) or (trung hoc)) khong cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (tien anh)) - hanh ((trang ha) OR (trung hoc)) khong cong san van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (tien anh)) - hanh ((trang ha) or (trung hoc)) khong cong san van ban*.