Perhaps you should try some spelling variations:
nhanh thang » nhanh thanh, nhanh quang, hanh trang
cong thanh » dong thanh, cong trinh, cong tan
theo sach » thuoc sach, te sach, theo lich
hieu cach » hieu cac, chieu sach, hieu ca
thang cua » thong cua, hang cua, than cua
dang cong » dung cong
thanh can » thanh san, thanh van, thanh tan
cua dang » cua cong, cua ban
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((theo sach) or (hieu cach)) - nhanh thang cua dang cong thanh can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (hieu cach)) - nhanh thang cua dang cong thanh can cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (hieu cach)) - nhanh thang cua dang cong thanh can cau*.