Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh manh » hanh mang, lanh manh, hoang manh
tong cong » trong cong, cong cong, dung cong
manh cua » doanh cua, ban cua
cua tong » cua cong, cua dong, cua nong
cong van » cong vang, cong san, song van
van tan » van tuan, van ban, van tai
tan tap » toan tap, han tap, tan tat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chiet tach) or (chinh sach)) - hanh manh cua tong cong van tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (chinh sach)) - hanh manh cua tong cong van tan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (chinh sach)) - hanh manh cua tong cong van tan tap*.