Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
danh dau » lanh dao, hang dau, danh tu
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
dau cuu » dau cua, dau cuoi
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. hieu ((van chat) OR (cao chat)) truc va danh dau cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. hieu ((van chat) OR (cao chat)) truc va danh dau cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. hieu ((van chat) OR (cao chat)) truc va danh dau cuu tre*.