Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chua thiet » chuan thiet, cua thiet, thua thiet
duc thuan » duc tan, duc thang, duc phan
thuan anh » tuan anh, thuan thanh, thuat lanh
toc sach » hoc sach, doc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
nang xa » nang x, lang xa, nang ma
va chua » vua chua, ca chua, va chu
y nang » ky nang, ly nang, v nang
anh va » hanh va

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) or (thuoc sach)) y nang xa hoi. hieu van pham duc thuan anh va chua thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) y nang xa hoi. hieu van pham duc thuan anh va chua thiet.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thuoc sach)) y nang xa hoi. hieu van pham duc thuan anh va chua thiet*.