Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thien van » thi van
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
so sach » so sanh, bo sach, co sach
vai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc dan, thuc day
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
tuc va » truc va, tuc xa, duc va
ha hoi » hoa hoi, xa hoi, va hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tay lang ((ha hoi) OR (ha noi)). thien van cam ((tuc va) or (thuc va)) thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tay lang ((ha hoi) OR (ha noi)). thien van cam ((tuc va) OR (thuc va)) thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tay lang ((ha hoi) OR (ha noi)). thien van cam ((tuc va) or (thuc va)) thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach tay lang ((ha hoi) OR (ha noi)). thien van cam ((tuc va) or (thuc va)) thanh vai cua tre*.