Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
cong quang » luong quang, thong quang, duong quang
quan tong » quan trong, quan dong, quan long
tong cong » trong cong, cong cong, dung cong
khi sach » khi sac, khoa sach, khau sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi khi sach - hanh trinh quan tong cong quang ((toan ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi khi sach - hanh trinh quan tong cong quang ((toan ban) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: doi khi sach - hanh trinh quan tong cong quang ((toan ban) or (van ban))*.