Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
dat cua » dai cua, day cua, mat cua
cac dac » cac dan, cac dai, cac bac
cac duc » cac du, cao duc, cac nuoc
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, ma hoa, me hoi
cua te » cua tu

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 y nang ((ma hoi) OR (xa hoi)). hieu ve ((cac duc) OR (cac dac)) va thanh dat cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((ma hoi) OR (xa hoi)). hieu ve ((cac duc) or (cac dac)) va thanh dat cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) OR (xa hoi)). hieu ve ((cac duc) or (cac dac)) va thanh dat cua te*.