Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thu nang » thi nang, thu hang, thu bang
vanh tai » van tai, hanh tai, anh tai
van vanh » van anh, van hanh, van manh
tai cua » thai cua, tai cuc, tri cua
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ve cac » va cac, vien cac
ma hoi » xa hoi, ma hoa, me hoi
cua tu » cua tuc, cua su, cua cu

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: ((te sach) OR (toc sach)) thu nang ((ma hoi) OR (mai hoi)). hieu ve cac xuc van vanh tai cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) thu nang ((ma hoi) or (mai hoi)). hieu ve cac xuc van vanh tai cua tu~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) thu nang ((ma hoi) or (mai hoi)). hieu ve cac xuc van vanh tai cua tu*.