Perhaps you should try some spelling variations:
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
cao hoa » cao hoat, cao khoa, cau hoa
hieu ve » hieu va, hieu van
cac toc » cac toi, cac nuoc, cac thoi
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
ve cac » va cac, vien cac
toc va » hoc va, toc ta, tuc va
cua te » cua tu

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)) ky nang cao hoa. hieu ve cac toc va hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang cao hoa. hieu ve cac toc va hanh vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang cao hoa. hieu ve cac toc va hanh vi ((cua tre) or (cua te))*.