Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ve chat » va chat, van chat
hanh di » hanh vi, hanh de, hang di
duc van » duc va, duc tan, duc manh
xuc van » luc van, vuc van, xuc ban
hieu ve » hieu va, hieu van
va sang » van sang, vua sang, va nang
cua duc » cua tuc, cua nuoc, cua quoc
ma hoi » mai hoi, xa hoi, ma hoa
_ sang » _ san
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((va sang) or (_ sang)) ma hoi. hieu ve chat ((xuc van) or (duc van)) hanh di cua duc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((va sang) OR (_ sang)) ma hoi. hieu ve chat ((xuc van) OR (duc van)) hanh di cua duc.
• Adding a wildcard symbol may retrieve word variants: toc sach ((va sang) or (_ sang)) ma hoi. hieu ve chat ((xuc van) or (duc van)) hanh di cua duc*.