Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
thanh khan » thanh phan, thanh nhan, thanh thanh
lieu tinh » trieu tinh, bien tinh
tung tuan » trung tuan, hung tuan, quang tuan
tran xuan » tran quang, tran van
dung cong » dung trong
khan cap » khan ap, than cap, khoan cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((lieu tinh) OR (diep tinh)) - thanh ((tung tuan) or (tran xuan)) dung cong thanh khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((lieu tinh) OR (diep tinh)) - thanh ((tung tuan) OR (tran xuan)) dung cong thanh khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((lieu tinh) OR (diep tinh)) - thanh ((tung tuan) or (tran xuan)) dung cong thanh khan cap".
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) OR (diep tinh)) - thanh ((tung tuan) or (tran xuan)) dung cong thanh khan cap*.