Perhaps you should try some spelling variations:
van pham » van phan, van phat, van tham
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
tu cach » tu cac
su sach » so sach, vu sach
ky dang » ky nang, ky danh
dang ma » dang mau, dang mam, dang mat
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky dang ma hoa. hieu ((van pham) or (san pham)) duc va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky dang ma hoa. hieu ((van pham) OR (san pham)) duc va thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky dang ma hoa. hieu ((van pham) or (san pham)) duc va thanh vi cua tre*.