Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
tu sach » thu sach, te sach, tu cach
vai cua » dai cua, hai cua, lai cua
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
ly hang » ly quang
ly nang » ky nang, ly vang, ly quang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao

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 (su sach)) ((ly nang) or (ly hang)) xa hoi. hieu va cam duc ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ((ly nang) OR (ly hang)) xa hoi. hieu va cam duc ban hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ((ly nang) or (ly hang)) xa hoi. hieu va cam duc ban hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ((ly nang) or (ly hang)) xa hoi. hieu va cam duc ban hanh vai cua tre*.