Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
hung cuong » hung vuong, hong cuong, hung luong
hoc thieu » toc thieu, hoc hien
hung cong » nhung cong, phung cong, dung cong
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 thiet ((hung cong) OR (hung cuong)) dan than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh trinh thiet ((hung cong) OR (hung cuong)) dan than cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh trinh thiet ((hung cong) OR (hung cuong)) dan than cao*.