Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
tran tuan » tran xuan, tran thanh, tranh luan
dung cong » dung trong
van khang » van khanh, van thanh, van quang
khang ban » hang ban, khang benh, khang chan

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