Perhaps you should try some spelling variations:
ban danh » ban doanh, ban hanh, ban dan
duc ban » duc tan, duc van, dua ban
tu sach » thu sach, su sach, te sach
cam duc » cam xuc, cao duc, pham duc
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
vi su » va su, ve su, oi su
ki su » ky su

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 ((y nang) or (v nang)) ma hoi. lieu va cam duc ban danh ((vi su) OR (ki su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) ma hoi. lieu va cam duc ban danh ((vi su) OR (ki su)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (v nang)) ma hoi. lieu va cam duc ban danh ((vi su) OR (ki su)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) ma hoi. lieu va cam duc ban danh ((vi su) OR (ki su)) triet*.