Perhaps you should try some spelling variations:
tao khoi » thao khoa, lao khoa, tao boi
su sach » so sach, vu sach
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
tao hoi » tao boi, tay hoi, thao hoc
ky sang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky sang ((tao khoi) OR (tao hoi)). ((hieu ve) or (lieu va)) cam xuc va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang ((tao khoi) OR (tao hoi)). ((hieu ve) OR (lieu va)) cam xuc va hanh va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky sang ((tao khoi) OR (tao hoi)). ((hieu ve) or (lieu va)) cam xuc va hanh va cua tre*".