Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh da » thanh dat, thanh dam, thanh dan
thuc van » thuc vat, thuc dan, thuc va
dau thuc » dan thuc, dai thuc, dam thuc
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly quang
ly vang » ly hang, ly van, ly quang
cau tre » cau tren, cau treo, cau tra
va dau » va dao
da cau » dat cau, va cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((((ly nang) OR (ly vang))) or (ty xang)) xa hoi. lieu va dau thuc van thanh da cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((((ly nang) OR (ly vang))) OR (ty xang)) xa hoi. lieu va dau thuc van thanh da cau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((((ly nang) OR (ly vang))) or (ty xang)) xa hoi. lieu va dau thuc van thanh da cau tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((((ly nang) OR (ly vang))) or (ty xang)) xa hoi. lieu va dau thuc van thanh da cau tre*.