Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
luat dung » suat dung, luat chung, thuat dung
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
quan cao » quang cao, quan cau, quan ao

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 luat dung ((cong tap) OR (cong tac)) quan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh trinh luat dung ((cong tap) OR (cong tac)) quan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh trinh luat dung ((cong tap) OR (cong tac)) quan cao*.