Perhaps you should try some spelling variations:
danh diem » danh dien, dinh diem, dac diem
cau tren » cu tren, dau tren, ca tren
lam ngoc » pham ngoc, lam nguoi, lang ngoc
diem cau » dieu can
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
vu nang » vuc nang, va nang, vu dang
lam loc » lam duoc
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) or (vu nang)) xa hoi. hieu va ((lam loc) OR (lam ngoc)) va danh diem cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (vu nang)) xa hoi. hieu va ((lam loc) OR (lam ngoc)) va danh diem cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (vu nang)) xa hoi. hieu va ((lam loc) OR (lam ngoc)) va danh diem cau tren".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (vu nang)) xa hoi. hieu va ((lam loc) OR (lam ngoc)) va danh diem cau tren*.