Perhaps you should try some spelling variations:
phat xuc » chat xuc, phat xuat, phap xu
ban hanh » ban hang
ky tang » ky dang, kho tang, ky trong
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
vai cua » dai cua, hai cua, lai cua
tu cai » tu cac, tu can, tu bai
vi cua » di 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 cai ((ky tang) or (ky nang)) mai hoi. hieu va phat xuc ban hanh ((vi cua) OR (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ((ky tang) OR (ky nang)) mai hoi. hieu va phat xuc ban hanh ((vi cua) OR (vai cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cai ((ky tang) or (ky nang)) mai hoi. hieu va phat xuc ban hanh ((vi cua) OR (vai cua)) te*".