Perhaps you should try some spelling variations:
khong thong » thong thong, khong trong, thong thuong
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
cua khong » hua khong, cua phuong, cua thuong
thong dan » thong van, tuong dan, thong den
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - ((thanh trung) or (hanh trinh)) cua khong thong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - ((thanh trung) OR (hanh trinh)) cua khong thong dan than cap*.