Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban hang » ngan hang
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
va cham » va chat, va tham
ha hoi » hoa hoi, ha noi, xa hoi
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: thuat sach ky lang ha hoi. lieu va cham soc ((ban hang) or (ban hanh)) ((vi cua) OR (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky lang ha hoi. lieu va cham soc ((ban hang) OR (ban hanh)) ((vi cua) OR (di cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky lang ha hoi. lieu va cham soc ((ban hang) or (ban hanh)) ((vi cua) OR (di cua)) tre*".