Perhaps you should try some spelling variations:
thai truc » thai thuc, thai tuc, thi truc
toc sach » hoc sach, doc sach, thuoc sach
hang dau » hang va, hang tai
ty nang » ky nang, ty hang, ly nang
va thai » van thai, va tai, va tham
truc va » thuc va, thuc vat, trung va
va hang » van hang, va nang, va lang
dau cua » dai cua, day cua, cau cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ty nang) OR (ty xang)) xa hoi. lieu va thai truc va hang dau cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ty nang) OR (ty xang)) xa hoi. lieu va thai truc va hang dau cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty nang) OR (ty xang)) xa hoi. lieu va thai truc va hang dau cua tre*.