Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
vai cua » dai cua, hai cua, lai cua
cac duc » cao duc, cac dac, cac nuoc
sach ty » sach y, sach thu, xach tay
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
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: vu ((sach ty) OR (sach tu)) nang xa hoi. hieu va ((cac duc) or (cac du)) ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ty) OR (sach tu)) nang xa hoi. hieu va ((cac duc) OR (cac du)) ban thanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ty) OR (sach tu)) nang xa hoi. hieu va ((cac duc) or (cac du)) ban thanh vai cua tre*".