Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuoc ban » thuoc tan, thuoc dang, thu ban
thuc ban » thuc dan, thu ban, thuc van
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
hieu ha » hieu hoa, hieu ca, hieu xa
nang xa » nang x, lang xa, nang ma
hanh va » hang va, hanh vi
so sach » so sanh, bo sach, co sach
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. ((hieu ha) OR (hieu va)) nam ((thuc ban) or (thuoc ban)) hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. ((hieu ha) OR (hieu va)) nam ((thuc ban) OR (thuoc ban)) hanh va cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. ((hieu ha) OR (hieu va)) nam ((thuc ban) or (thuoc ban)) hanh va cua triet*".