Perhaps you should try some spelling variations:
ngan danh » ngan hang, ngan sach, nhan dan
dau tren » dau tien, dat tren, dau tieng
cham cuu » cap cuu, chat cua
chat cuu » chat huu, chat cua, cap cuu
hieu ve » hieu va, hieu van
ty nang » ky nang, ty hang, ly nang
danh va » doanh va, hanh va, anh va
tu sach » thu sach, su sach, te sach
va dau » va dao

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 ((ty nang) or (ty xang)) xa hoi. hieu ve ((chat cuu) OR (cham cuu)) ngan danh va dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) xa hoi. hieu ve ((chat cuu) OR (cham cuu)) ngan danh va dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ty xang)) xa hoi. hieu ve ((chat cuu) OR (cham cuu)) ngan danh va dau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty xang)) xa hoi. hieu ve ((chat cuu) OR (cham cuu)) ngan danh va dau tren*.