Perhaps you should try some spelling variations:
thanh soc » thanh son, nhanh soc, thanh hoc
va thanh » gia thanh, ban thanh, va tinh
soc van » hoc van, oc van, sac van
hieu va » lieu va, hieu qua
su sach » so sach
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
anh vi » hanh vi, anh va, anh vu
anh ve » hanh ve, anh va, anh viet

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) or (vu sach)) ky nang ma hoi. hieu va thanh soc van ((anh vi) OR (anh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang ma hoi. hieu va thanh soc van ((anh vi) OR (anh ve)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky nang ma hoi. hieu va thanh soc van ((anh vi) OR (anh ve)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang ma hoi. hieu va thanh soc van ((anh vi) OR (anh ve)) cua tre*.