Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, bien tinh
tung tuan » trung tuan, quang tuan, trang tuan
hung tuan » hung tran, quang tuan, trung tuan
cong ban » cong bang, cong san, cong tan
ban khan » ban than, ban nhan, ban chan
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: so ((lieu tinh) or (diep tinh)) - thanh ((tung tuan) OR (hung tuan)) nhung cong ban khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((lieu tinh) OR (diep tinh)) - thanh ((tung tuan) OR (hung tuan)) nhung cong ban khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((lieu tinh) or (diep tinh)) - thanh ((tung tuan) OR (hung tuan)) nhung cong ban khan cap".
• Adding a wildcard symbol may retrieve word variants: so ((lieu tinh) or (diep tinh)) - thanh ((tung tuan) OR (hung tuan)) nhung cong ban khan cap*.