Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
tu sach » su sach, te sach, tu cach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
ky sang » ky dang, ky tang, duy sang
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ((ky sang) or (ky nang)) ma hoi. hieu van cam xuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ((ky sang) OR (ky nang)) ma hoi. hieu van cam xuc va hanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ((ky sang) or (ky nang)) ma hoi. hieu van cam xuc va hanh vai cua tre*".