Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sach » chiet tach, chieu sang, chieu xanh
quan lang » quan hoang, gian lang, quan luan
mang cua » manh cua, dung cua, cong cua
cong tan » cong tac, cong san, cong thanh
tan quan » tang quan, toan quan, van quan
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chinh sach)) - hanh ((mang cua) OR (ban cua)) thuong cong tan quan lang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chinh sach)) - hanh ((mang cua) OR (ban cua)) thuong cong tan quan lang.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chinh sach)) - hanh ((mang cua) OR (ban cua)) thuong cong tan quan lang".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chinh sach)) - hanh ((mang cua) OR (ban cua)) thuong cong tan quan lang*.