Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
so sach » so sanh, bo sach, co sach
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (so sach)) ky nang x ho. hieu ((ve cam) or (ve cac)) thuc va tinh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) ky nang x ho. hieu ((ve cam) OR (ve cac)) thuc va tinh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) ky nang x ho. hieu ((ve cam) or (ve cac)) thuc va tinh va cua tre*.