Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hau sach » khau sach, cau sach, ham sach
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
hanh xuc » hanh xu, hanh phuc, hanh duoc
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
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: ((tu sach) or (((hau sach) or (thu hoach)))) ky nang x hoi. hieu van hanh xuc va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (((hau sach) OR (thu hoach)))) ky nang x hoi. hieu van hanh xuc va thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (((hau sach) or (thu hoach)))) ky nang x hoi. hieu van hanh xuc va thanh vai cua tre*.