Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
tu sach » thu sach, te sach, tu cach
dai cuu » dai cua, dai huu
cuc ban » cua ban, cac ban, cuu ban
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
su sach » so sach, vu sach
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, ve cai

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)) y nang ma hoi. hieu ((ve cam) or (va cam)) cuc ban hanh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y nang ma hoi. hieu ((ve cam) OR (va cam)) cuc ban hanh dai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) y nang ma hoi. hieu ((ve cam) or (va cam)) cuc ban hanh dai cuu tre*.