Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
vu sach » vu bach, su sach, vu khach
sach tu » sach thu, cach tu, sach ty
vai cua » dai cua, hai cua, lai cua
cao suc » cao su
cua tre » cua te, cuu tre, cua triet
cao duc » dao duc, tao duoc, cho duoc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
tu nang » tru nang, tu nong, tu nano
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 nang ma hoi. hieu va ((((cao duc) OR (cao suc))) or (giao duc)) ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tu nang ma hoi. hieu va ((((cao duc) OR (cao suc))) OR (giao duc)) ban thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tu nang ma hoi. hieu va ((((cao duc) OR (cao suc))) or (giao duc)) ban thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach tu nang ma hoi. hieu va ((((cao duc) OR (cao suc))) or (giao duc)) ban thanh vai cua tre*.