Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
anh vai » anh va, anh bai, anh tai
anh van » anh va, thanh van, doanh van
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ly nang x hoi. hieu ve ((cau truc) or (cam xuc)) tuan ((anh vai) OR (anh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ly nang x hoi. hieu ve ((cau truc) OR (cam xuc)) tuan ((anh vai) OR (anh van)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ly nang x hoi. hieu ve ((cau truc) or (cam xuc)) tuan ((anh vai) OR (anh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: doc sach ly nang x hoi. hieu ve ((cau truc) or (cam xuc)) tuan ((anh vai) OR (anh van)) cua tre*.