Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
vu sach » vu bach, vu khach
su sach » so sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (su sach)) ky lang xa hoi. hieu va ((cac tuc) or (cac bai)) gia thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ky lang xa hoi. hieu va ((cac tuc) OR (cac bai)) gia thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ky lang xa hoi. hieu va ((cac tuc) or (cac bai)) gia thanh vai cua tre*.