Perhaps you should try some spelling variations:
thanh ban » thanh san, thanh van, thanh bac
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
hieu va » lieu va, hieu qua
ban cua » ban quan
cac duc » cac du, cao duc, cac dac
hieu ve » hieu van
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) y nang ma hoi. ((hieu ve) or (hieu va)) cac duc va thanh ban cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y nang ma hoi. ((hieu ve) OR (hieu va)) cac duc va thanh ban cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) y nang ma hoi. ((hieu ve) or (hieu va)) cac duc va thanh ban cua tre*".