Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
sang tao » hang tai
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
tao hoi » tao khoi, tao boi, tay hoi
ty sang » ty xang, ty hang, duy sang
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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) or (vu sach)) ty sang tao hoi. ((hieu ve) or (hieu va)) cam xuc va thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty sang tao hoi. ((hieu ve) OR (hieu va)) cam xuc va thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ty sang tao hoi. ((hieu ve) or (hieu va)) cam xuc va thanh dai cua tre*.