Perhaps you should try some spelling variations:
lieu tinh » diep tinh, bien tinh
nhan dang » nhan dan, phan dang, tran dang
dang cong » dung cong
tac thanh » bac thanh, cac thanh, tcc thanh
cong tac » cong ty
thanh ha » thanh hoa, thanh hai, nhanh ha
va dang » van dang, va nang, va lang

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 (trieu tinh)) - ((nhanh quang) or (nhan dang)) va dang cong tac thanh ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((lieu tinh) OR (trieu tinh)) - ((nhanh quang) OR (nhan dang)) va dang cong tac thanh ha.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((lieu tinh) OR (trieu tinh)) - ((nhanh quang) or (nhan dang)) va dang cong tac thanh ha".
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) OR (trieu tinh)) - ((nhanh quang) or (nhan dang)) va dang cong tac thanh ha*.