Perhaps you should try some spelling variations:
vat hanh » vat thanh, van hanh, va hanh
hieu ve » hieu va, hieu van
hanh di » hanh vi, hanh de, hang di
cau tre » cau tren, cau treo, cau tra
sach v » sach va, sach y, sach vay
sach 2 » sach y
di cau » da cau, diem cau
x hoi » o hoi, x ho, 5 hoi
ve am » va am
thuc » thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach v) or (sach 2)) nang ((x hoi) or (xa hoi)). hieu ve am thuc vat hanh di cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) nang ((x hoi) OR (xa hoi)). hieu ve am thuc vat hanh di cau tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach 2)) nang ((x hoi) or (xa hoi)). hieu ve am thuc vat hanh di cau tre*.