Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
tu sach » thu sach, te sach, tu cach
va danh » va dinh, va dan, dia danh
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, ban hanh
te cua » tue cua, le cua, de cua
v pham » vi pham, d pham
hieu v » hieu va, hieu ve, hieu 2
cua te » cua tu

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: ((tu sach) OR (su sach)) ty nang xa hoi. hieu v pham thuc ((va danh) OR (va hanh)) te cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ty nang xa hoi. hieu v pham thuc ((va danh) OR (va hanh)) te cua te~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang xa hoi. hieu v pham thuc ((va danh) OR (va hanh)) te cua te*.