Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
lanh tranh » canh tranh, lan tranh, hanh trinh
dien sach » dien anh
cua thong » cua thuong, cua khong, cua tong
doc dien » duoc dien, doi dien, do dien
van manh » van minh, van anh, van hanh
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

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