Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
danh duy » manh duy, danh du, dinh duy
hieu va » lieu va, hieu qua
cam loc » cam lo
va danh » va dinh, va dan, va hanh
duy cua » day cua, dung cua
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
va cam » va cham, va cac, va cao
loc va » hoc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ((y nang) or (ky nang)) xa hoi. hieu va cam loc va danh duy cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((y nang) OR (ky nang)) xa hoi. hieu va cam loc va danh duy cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ((y nang) or (ky nang)) xa hoi. hieu va cam loc va danh duy cua tre*.