Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
su sach » so sach, vu sach
thi van » thi lan, thi hanh, thi nang
vai cua » dai cua, hai cua, lai cua
van cam » van nam, van lam, van cau
lang ha » long ha
lang xa » dang xay, lang van
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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 ((lang xa) OR (lang ha)) hoi. thi van cam ((duc va) or (tuc va)) thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((lang xa) OR (lang ha)) hoi. thi van cam ((duc va) OR (tuc va)) thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((lang xa) OR (lang ha)) hoi. thi van cam ((duc va) or (tuc va)) thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y ((lang xa) OR (lang ha)) hoi. thi van cam ((duc va) or (tuc va)) thanh vai cua tre*.