Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, nhung don
hang cong » dang cong, hang nong, bang cong
chinh va » chinh ta, chinh tai, hanh va
van tuan » van quan, van ban, anh tuan
tuan tap » toan tap, tuan tai, tuyen tap

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 khang) or (chieu xanh)) - hanh chinh va ((nhung cong) OR (hang cong)) van tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu khang) OR (chieu xanh)) - hanh chinh va ((nhung cong) OR (hang cong)) van tuan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) or (chieu xanh)) - hanh chinh va ((nhung cong) OR (hang cong)) van tuan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) or (chieu xanh)) - hanh chinh va ((nhung cong) OR (hang cong)) van tuan tap*.