Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong dong, truong cong
thuong con » thuong dong, truong cong, thong cong
tieu sach » chieu sach, dien sach, te sach
canh manh » canh tranh, cach mang, van manh
lanh manh » lanh tranh, lan anh, van manh
dan phan » doan phan, dan chan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - ((canh manh) OR (lanh manh)) cua ((thuong cong) or (thuong con)) dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((canh manh) OR (lanh manh)) cua ((thuong cong) OR (thuong con)) dan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - ((canh manh) OR (lanh manh)) cua ((thuong cong) or (thuong con)) dan phan tu".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((canh manh) OR (lanh manh)) cua ((thuong cong) or (thuong con)) dan phan tu*.