Perhaps you should try some spelling variations:
thanh trung » thanh tung
tieu sach » chieu sach, dien sach, te sach
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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 - ((((hanh tang) OR (hanh mang))) or (thanh trung)) cua dong cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((((hanh tang) OR (hanh mang))) OR (thanh trung)) cua dong cong tan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - ((((hanh tang) OR (hanh mang))) or (thanh trung)) cua dong cong tan toan ban".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((((hanh tang) OR (hanh mang))) or (thanh trung)) cua dong cong tan toan ban*.