Perhaps you should try some spelling variations:
tung thanh » trung thanh, dung thanh, hung thanh
tang thanh » dang thanh, trung thanh, hoang thanh
nhung cong » dung cong, thong cong, hang cong
ho chinh » hoc chinh, cho chinh, hoa chinh
hoa hinh » hoa sinh, hoa binh, hoan chinh
cong tac » cong ty
tac hang » tac vang, bac thang, tac chong
hang dau » hang va, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chinh) or (hoa hinh)) sach - thanh ((tung thanh) OR (tang thanh)) nhung cong tac hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chinh) OR (hoa hinh)) sach - thanh ((tung thanh) OR (tang thanh)) nhung cong tac hang dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chinh) or (hoa hinh)) sach - thanh ((tung thanh) OR (tang thanh)) nhung cong tac hang dau".
• Adding a wildcard symbol may retrieve word variants: ((ho chinh) or (hoa hinh)) sach - thanh ((tung thanh) OR (tang thanh)) nhung cong tac hang dau*.