Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan nhung » qua nhung, cua nhung, luan chung
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
chu sach » cau sach, thu sach, chieu sach
hau sach » khau sach, cau sach, ham sach
toan cao » toan tap
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: chao ((chu sach) or (hau sach)) - hanh trinh quan nhung cong thanh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao ((chu sach) OR (hau sach)) - hanh trinh quan nhung cong thanh ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: chao ((chu sach) or (hau sach)) - hanh trinh quan nhung cong thanh ((toan cao) or (toan ban))*.