Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh thanh » nhanh thanh, thanh thanh, khanh thanh
cong ngang » cong nhan, cong quang, cong lang
cong luong » cong thuong, nang luong, cong dong
hoc chieu » hoc thieu, ho chieu, hoc hien
thanh su » thanh sau, thanh tu, hanh su
toan cau » toan cao, toan tap, toan tai
toan ban » van 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 chieu xanh - hanh thanh su dung ((cong ngang) or (cong luong)) ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh thanh su dung ((cong ngang) OR (cong luong)) ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh thanh su dung ((cong ngang) or (cong luong)) ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh thanh su dung ((cong ngang) or (cong luong)) ((toan cau) OR (toan ban))*.