Perhaps you should try some spelling variations:
cong ngang » cong nhan, cong quang, cong lang
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
chinh cua » chinh ca, chinh sua, hinh cua
cong vang » cong lang, cong quang, cong san
cua dung » cua dang, cua dong, qua dung
toan cau » toan cao, toan ban, toan tap

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 chinh cua dung ((cong vang) or (cong ngang)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh chinh cua dung ((cong vang) OR (cong ngang)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh chinh cua dung ((cong vang) or (cong ngang)) toan cau*.