Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu cacch » hieu cach
trinh quan » tinh quang, trinh luat, trinh han
quan thong » quang thong, quan trong, xuan thong
thong cong » trong cong, tong cong, thong thong
theo sach » thuoc sach, te sach, theo lich
hieu cac » hieu luc, hieu va, hieu van
cong san » cong tac
san van » tan van, luan van, tran van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (((hieu cacch) OR (hieu cac)))) - hanh trinh quan thong cong san van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (((hieu cacch) or (hieu cac)))) - hanh trinh quan thong cong san van ban*.