Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
day danh » day manh, dai danh, dao danh
thuc day » thuc dan, thuc vat
su sach » so sach
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
vu sach » vu bach, vu khach
te cua » tue cua, de cua
le cua » ly cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty nang xa hoi. hieu ve pham thuc day danh ((te cua) OR (le cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ty nang xa hoi. hieu ve pham thuc day danh ((te cua) OR (le cua)) te~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ty nang xa hoi. hieu ve pham thuc day danh ((te cua) OR (le cua)) te*.