Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hang tai » hang va, dung tai
ban hang » ngan hang
chat xuc » chat huu, cam xuc, chao xu
tu sach » thu sach, su sach, te sach
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
sach ky » sac ky, sach y, sach ty
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
tai hoa » tai khoa, thai hoa, thi hoa
ky hang » ky nang, ly hang, ky dang

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 ky hang tai hoa. hieu ve chat xuc ((van hanh) or (ban hang)) ((vai cua) OR (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky hang tai hoa. hieu ve chat xuc ((van hanh) OR (ban hang)) ((vai cua) OR (lai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky hang tai hoa. hieu ve chat xuc ((van hanh) or (ban hang)) ((vai cua) OR (lai cua)) tre*".