Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » hieu quang, nhieu tang, hieu van
chinh cua » chinh ca, chinh sua, hinh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
toan cao » toan ban
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 ((chieu sang) or (hieu lang)) - hanh chinh cua dung cong thanh ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - hanh chinh cua dung cong thanh ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu lang)) - hanh chinh cua dung cong thanh ((toan cao) or (toan tap))*.