Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
cua tre » cua te, cuu tre, cua triet
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
tu sach » thu sach, su sach, tu cach
te sach » toc sach
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
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) OR (te sach)) ky nang o hoi. hieu ve cam xuc va tinh vi ((cua tre) OR (dau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang o hoi. hieu ve cam xuc va tinh vi ((cua tre) or (dau tren))~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang o hoi. hieu ve cam xuc va tinh vi ((cua tre) or (dau tren))*.