Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
va thanh » gia thanh, ban thanh, va tinh
tang van » dang van, hoang van, trong van
tu sach » thu sach, su sach, tu cach
dam cua » dai cua, day cua, nam cua
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
van hoi » van hoa, van hoc, van hoe
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai

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)) ky tang van hoi. hieu ((va cam) OR (va cao)) thuc va thanh dam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky tang van hoi. hieu ((va cam) OR (va cao)) thuc va thanh dam cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky tang van hoi. hieu ((va cam) OR (va cao)) thuc va thanh dam cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky tang van hoi. hieu ((va cam) OR (va cao)) thuc va thanh dam cua tre*.