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