Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
tham cuu » cham cuu, tham cung, thai cua
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
hang xa » hoang xa, hang va, hang ca
hieu va » hieu qua
cua tre » cua te, cuu tre, cua triet
y hang » ly hang, ty hang, yu hang
cuu va » cuu van, cuu ve

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 y hang xa hoi. ((hieu va) OR (lieu va)) tham cuu va thanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y hang xa hoi. ((hieu va) OR (lieu va)) tham cuu va thanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y hang xa hoi. ((hieu va) OR (lieu va)) tham cuu va thanh dai cua tre*.