Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
ban hanh » ban hang
toc sach » hoc sach, doc sach, thuoc sach
cham xuc » cam xuc, chat xuc, cham soc
dang cac » dung cac, bang cac, dong cac
cac khoi » cac thoi, cac khoan, cach thoi
xuc ban » duc ban, cuc ban, quoc ban
ky dang » ky nang, ky danh
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) ky dang cac khoi. hieu van cham xuc ban hanh ((vi cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky dang cac khoi. hieu van cham xuc ban hanh ((vi cua) OR (di cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky dang cac khoi. hieu van cham xuc ban hanh ((vi cua) or (di cua)) tre*".