Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh dat, thanh oai
thanh tai » thanh hai, thanh toan, doanh tai
cham cuu » cap cuu, chat cua
thi hang » thi hanh, thi nang, thi hong
su sach » so sach
va cham » va chat, va tham
cuu ban » cuu van, cua ban, cuu san
hieu va » lieu va, hieu qua
hang xa » hoang xa, hang va, hang ca
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet

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)) thi hang xa hoi. hieu va cham cuu ban ((thanh dai) or (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) thi hang xa hoi. hieu va cham cuu ban ((thanh dai) OR (thanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) thi hang xa hoi. hieu va cham cuu ban ((thanh dai) or (thanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) thi hang xa hoi. hieu va cham cuu ban ((thanh dai) or (thanh tai)) cua tre*.