Perhaps you should try some spelling variations:
te sach » toc sach
dinh va » dinh van, dinh ve, tinh va
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
hieu va » hieu qua
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
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: te sach ((ky lang) or (ky tang)) ha hoi. ((lieu va) or (hieu va)) am thuc va dinh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky tang)) ha hoi. ((lieu va) OR (hieu va)) am thuc va dinh va cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (ky tang)) ha hoi. ((lieu va) or (hieu va)) am thuc va dinh va cua tre*.