Perhaps you should try some spelling variations:
thai cua » than cua, tai cuc, tri cua
dang mau » dong mau, dang van, dang su
va thanh » ban thanh, va tinh, le thanh
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
mau hoi » cau hoi, mai hoi, mau ho
ky dang » ky nang, ky danh
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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 hoi. hieu ((ve cam) OR (ve cac)) luc ((va thanh) or (gia thanh)) thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang mau hoi. hieu ((ve cam) OR (ve cac)) luc ((va thanh) OR (gia thanh)) thai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang mau hoi. hieu ((ve cam) OR (ve cac)) luc ((va thanh) or (gia thanh)) thai cua tre*".