Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu sach » chieu sach, hieu cach, hieu cac
dien sach » dien anh
lanh manh » lanh tranh, lan anh, anh anh
cua thong » cua thuong, cua khong, cua tong
van manh » van minh, van anh, van hanh
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sach) or (dien sach)) - ((lanh manh) or (van manh)) cua thong cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (dien sach)) - ((lanh manh) OR (van manh)) cua thong cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) or (dien sach)) - ((lanh manh) or (van manh)) cua thong cong dan than cao*.