Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban hanh » ban hang
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
ban anh » ban banh, ban danh, bang anh
lam xuc » cam xuc, lam duoc
van lam » van nam
nang xa » nang x, lang xa, nang ma
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: thuoc sach y nang xa hoi. hieu van lam xuc ((ban anh) OR (ban hanh)) va ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang xa hoi. hieu van lam xuc ((ban anh) OR (ban hanh)) va ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang xa hoi. hieu van lam xuc ((ban anh) OR (ban hanh)) va ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang xa hoi. hieu van lam xuc ((ban anh) OR (ban hanh)) va ((dua tren) or (cuu tre))*.