Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
cong vang » cong lang, cong quang, cong ngang
cua dang » cua cong, cua ban
cong van » cong san, song van, cong tan
tuan tai » toan tai, quan tai, tan tai
so lieu » so dieu

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