Perhaps you should try some spelling variations:
chan thuong » phan thuong, han thuong, hang thuong
thanh trung » thanh tung
trung chan » trung phan, trong chan, trung can
cong ngang » cong nhan, cong quang, cong lang
hoc thieu » toc thieu, hoc hien
cong vang » cong lang, cong quang, cong san
doc hieu » toc thieu, hoc hien
tuan cau » toan cau, quan cau, tuan cu

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) or (doc hieu)) tinh - thanh trung chan thuong ((cong vang) OR (cong ngang)) tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doc hieu)) tinh - thanh trung chan thuong ((cong vang) OR (cong ngang)) tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doc hieu)) tinh - thanh trung chan thuong ((cong vang) OR (cong ngang)) tuan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doc hieu)) tinh - thanh trung chan thuong ((cong vang) OR (cong ngang)) tuan cau*.