Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hoc chieu » hoc thieu, ho chieu, hoc hien
chinh cua » chinh sua, hinh cua, chinh luan
dung cong » dung trong
chinh ca » chinh ta, chinh va, chinh tai
cong tan » cong tac, cong san, cong thanh
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 sang - hanh ((chinh cua) or (chinh ca)) dung cong tan ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh ((chinh cua) OR (chinh ca)) dung cong tan ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - hanh ((chinh cua) or (chinh ca)) dung cong tan ((toan cau) or (toan ban))*.