Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
te sach » toc sach
hai cuc » tai cuc, hai cua, thai cua
hieu va » lieu va, hieu qua
tu nano » truc nano
tu nong » tu dong, tu cong, tu tong
cuc tre » duc tre, cua tre, cuu tre
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, duc va
x hoi » xa hoi, o hoi, x ho

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 ((tu nong) or (tu nano)) x hoi. hieu va cao ((tuc va) OR (tuc xa)) thanh hai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nong) OR (tu nano)) x hoi. hieu va cao ((tuc va) OR (tuc xa)) thanh hai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nong) or (tu nano)) x hoi. hieu va cao ((tuc va) OR (tuc xa)) thanh hai cuc tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nong) or (tu nano)) x hoi. hieu va cao ((tuc va) OR (tuc xa)) thanh hai cuc tre*.