Perhaps you should try some spelling variations:
tinh tai » trinh tai, tinh thai, tinh hai
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
tai cua » thai cua, tai cuc, tri cua
va tinh » may tinh
cam tuc » cam xuc, cam tu, nam thuc
mau coi » dau cuoi, mau chot
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
mau co » mai co, dau co, au co
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

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 ky dang ((mau coi) or (mau co)). hieu ve cam tuc va tinh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang ((mau coi) OR (mau co)). hieu ve cam tuc va tinh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang ((mau coi) or (mau co)). hieu ve cam tuc va tinh tai cua tre*.