Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh
hoc thieu » toc thieu, hoc hien
cong cong » cong dong, trong cong, dung cong
qua cong » cua cong, qua song, va cong
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
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 thieu sang - ((hanh trinh) or (hanh chinh)) qua cong cong dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh trinh) OR (hanh chinh)) qua cong cong dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh trinh) or (hanh chinh)) qua cong cong dan ((toan cao) or (toan ban))*.