Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
tinh voi » trinh voi, tinh doi, binh voi
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
tinh vi » trinh vi, tinh va, dinh vi
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
xuc va » duc va, tuc va, luc va
ve cam » ve cham, ve cac, va cam
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o hoi. hieu ve cam xuc va ((tinh vi) OR (tinh voi)) ((cua tre) OR (dau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang o hoi. hieu ve cam xuc va ((tinh vi) OR (tinh voi)) ((cua tre) or (dau tren))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hoi. hieu ve cam xuc va ((tinh vi) OR (tinh voi)) ((cua tre) or (dau tren))*.