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
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 thiet hung cong dan than cao~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh trinh thiet hung cong dan than cao*.