Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh trang » thanh trung, hanh trinh, minh trang
chi sach » chinh sach, chieu sach, co sach
va thong » va thuong, va phuong, he thong
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, tran tuan
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - ((hanh trang) or (canh tranh)) va thong cong tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - ((hanh trang) OR (canh tranh)) va thong cong tan tran tap.
• Adding a wildcard symbol may retrieve word variants: doi chi sach - ((hanh trang) or (canh tranh)) va thong cong tan tran tap*.