Perhaps you should try some spelling variations:
ban hang » ngan hang
sach dao » lanh dao
nang mai » nang ma, nang tai, lang mai
cao xuc » cam xuc, cao duc, cao suc
xuc ban » duc ban, cuc ban, quoc ban
hieu va » lieu va, hieu qua
sach lo » sach doi, sach hoi, sach moi
mai hoi » mai khoi, dai hoi, lai hoi
va cao » va cac, va co, va dao
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: tu ((sach lo) or (sach dao)) nang mai hoi. hieu va cao xuc ban hang ((vi cua) OR (di cua)) tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach lo) OR (sach dao)) nang mai hoi. hieu va cao xuc ban hang ((vi cua) OR (di cua)) tuc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach lo) or (sach dao)) nang mai hoi. hieu va cao xuc ban hang ((vi cua) OR (di cua)) tuc*".