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
cao duc » dao duc, cao suc, tao duoc
sach tu » sach thu, sach ty, sach uu
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
cach tu » cach thuc
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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 tu) OR (cach tu)) nang ma hoi. hieu va ((cao duc) or (giao duc)) ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach tu) OR (cach tu)) nang ma hoi. hieu va ((cao duc) OR (giao duc)) ban thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach tu) OR (cach tu)) nang ma hoi. hieu va ((cao duc) or (giao duc)) ban thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: vu ((sach tu) OR (cach tu)) nang ma hoi. hieu va ((cao duc) or (giao duc)) ban thanh vai cua tre*.