Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
sinh sach » chinh sach, sinh san, sang sach
chua bang » chu bang, chua nang, chua xang
van thuat » va thuat, van thuan, van tuan
thuat dam » thuat cam, thuat do, thuat xay
cua bang » cua ban, cua dang, cua hang
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh sach - hanh trinh ((cua bang) or (chua bang)) cong van thuat dam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh sach - hanh trinh ((cua bang) OR (chua bang)) cong van thuat dam*.