Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
vu sach » vu bach, su sach
hanh va » hang va, hanh vi
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
nang co » nang cao, nang doc, nang noi
hieu va » lieu va, hieu qua
thu va » thue va, tu va, thu ha
co loi » co hoi
va cua » va chua, via cua, ca cua
va cam » va cham, va cac, va cao

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: ((vu sach) OR (vu khach)) ky nang co loi. hieu va cam ((thu va) OR (thuc va)) hanh va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (vu khach)) ky nang co loi. hieu va cam ((thu va) OR (thuc va)) hanh va cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khach)) ky nang co loi. hieu va cam ((thu va) OR (thuc va)) hanh va cua tre*.