Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
hieu manh » hieu nganh, dieu hanh, hien hanh
cua thong » cua thuong, cua khong, cua tong
anh dung » anh dong, anh huong, sach dung
dung cua » dung luan, dung cho
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu xanh)) - anh dung cua thong ((cong thanh) OR (dong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - anh dung cua thong ((cong thanh) OR (dong thanh)) toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu xanh)) - anh dung cua thong ((cong thanh) OR (dong thanh)) toan tap*".