Perhaps you should try some spelling variations:
cac truc » cau truc, cac tru, cac trung
tu sach » thu sach, su sach, tu cach
te sach » toc sach
qua cac » cua cac
truc va » thuc va, thuc vat, trung va
va tinh » may tinh
tinh ca » tinh cao, tinh cua, tinh va
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ca cua » co cua

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) or (te sach)) y nang ((le hoi) or (ma hoa)). hieu qua cac truc va tinh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang ((le hoi) OR (ma hoa)). hieu qua cac truc va tinh ca cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang ((le hoi) or (ma hoa)). hieu qua cac truc va tinh ca cua tre*.