Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
va hanh » van hanh, va danh, ban hanh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
ve cac » va cac, vien cac
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 (hoc sach)) y nang ma hoi. hieu ve cac duc ((va hanh) or (va thanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) y nang ma hoi. hieu ve cac duc ((va hanh) OR (va thanh)) dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) y nang ma hoi. hieu ve cac duc ((va hanh) or (va thanh)) dai cua tre*.