Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
hanh hai » thanh hai, nhanh hai, hang hai
hieu va » lieu va, hieu qua
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
cao xuc » cam xuc, cao duc, cao suc
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
va cao » va cac, va co, va dao
xuc va » duc va, tuc 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 sinh) or (nuoc sach)) ((ky lang) or (ky tang)) xa hoi. hieu va cao xuc va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sinh) OR (nuoc sach)) ((ky lang) OR (ky tang)) xa hoi. hieu va cao xuc va hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((hoc sinh) or (nuoc sach)) ((ky lang) or (ky tang)) xa hoi. hieu va cao xuc va hanh hai cua tre*.