Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien sang » hien trang, khien bang, chieu sang
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
cong sanh » cong danh, cong sach, cong thanh
cong san » cong tac
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: hoc hien sang - hanh trinh cua nhung ((cong sanh) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sang - hanh trinh cua nhung ((cong sanh) OR (cong san)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien sang - hanh trinh cua nhung ((cong sanh) or (cong san)) toan ban*.