Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thanh trung » thanh tung
thieu sang » chieu sang, thieu quang, hieu lang
trung tuan » trung thanh, trung tam, tran tuan
khong cong » khong cang, chong cong, khong con
thong cong » trong cong, tong cong, thong thong
dan thanh » dang thanh, danh thanh, ban thanh
thanh hai » thanh phan, thanh hoa, thanh san

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) or (thieu khang)) - thanh trung tuan ((khong cong) OR (thong cong)) dan thanh hai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - thanh trung tuan ((khong cong) OR (thong cong)) dan thanh hai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thieu khang)) - thanh trung tuan ((khong cong) OR (thong cong)) dan thanh hai".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu khang)) - thanh trung tuan ((khong cong) OR (thong cong)) dan thanh hai*.