Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
sach thu » sach thue, sach thieu, sach tham
ve thanh » le thanh, de thanh, den thanh
cham cuu » cap cuu, chat cua
vai cua » dai cua, hai cua, lai cua
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, xach tay
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cuu ve » cuu 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 ty) OR (sach thu)) ((nang xa) or (nang ma)) hoi. hieu ve cham cuu ve thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) ((nang xa) OR (nang ma)) hoi. hieu ve cham cuu ve thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach thu)) ((nang xa) or (nang ma)) hoi. hieu ve cham cuu ve thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach thu)) ((nang xa) or (nang ma)) hoi. hieu ve cham cuu ve thanh vai cua tre*.