Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
trung cua » truong cua, trung cap, dung cua
dang cong » dung cong
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
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: ((toc thieu) or (so lieu)) tinh - thanh ((trung cua) OR (trung tuan)) dang cong van tuan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (so lieu)) tinh - thanh ((trung cua) OR (trung tuan)) dang cong van tuan tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc thieu) or (so lieu)) tinh - thanh ((trung cua) OR (trung tuan)) dang cong van tuan tai".
• Adding a wildcard symbol may retrieve word variants: ((toc thieu) or (so lieu)) tinh - thanh ((trung cua) OR (trung tuan)) dang cong van tuan tai*.