Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
sang tao » hang tai
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sach ky) OR (sach ty)) ((nang cao) or (sang tao)) roi. hieu ve cam duc va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sach ty)) ((nang cao) OR (sang tao)) roi. hieu ve cam duc va thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sach ty)) ((nang cao) or (sang tao)) roi. hieu ve cam duc va thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) OR (sach ty)) ((nang cao) or (sang tao)) roi. hieu ve cam duc va thanh vai cua tre*.