Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hanh trang » canh tranh, hanh trinh, minh trang
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
dan thai » dang thai, dan thi, dan than
thai cao » tai cao, thoai cac, thuat cao

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 trang) or (thanh trung)) cua ((nhung cong) or (dung cong)) dan thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh trang) OR (thanh trung)) cua ((nhung cong) OR (dung cong)) dan thai cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh trang) or (thanh trung)) cua ((nhung cong) or (dung cong)) dan thai cao*.