Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » hanh chinh
thiet hung » thuyet hung, viet hung, hiep hung
hoc thieu » toc thieu, hoc hien
hung cong » nhung cong, hung cuong, phung cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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 (canh tranh)) thiet hung cong dan than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((hanh trinh) OR (canh tranh)) thiet hung cong dan than cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh trinh) OR (canh tranh)) thiet hung cong dan than cao*.