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
cua tuc » cua duc, cua tu, cua thuoc
ma hoi » mai hoi, xa hoi, ma hoa
_ sang » _ san
v sang » va sang, ve sang, van sang
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 ((v sang) OR (_ sang)) ma hoi. hieu ve chat ((xuc van) or (duc van)) hanh di cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((v sang) OR (_ sang)) ma hoi. hieu ve chat ((xuc van) OR (duc van)) hanh di cua tuc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((v sang) OR (_ sang)) ma hoi. hieu ve chat ((xuc van) or (duc van)) hanh di cua tuc*".