Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
cam loc » cam lo
cua cua » cua chua, ca cua, qua cua
va ban » va bai, va bao

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 ky nang xa hoi. ((hieu va) or (hieu qua)) cam loc ((va ban) OR (van ban)) cua cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu va) OR (hieu qua)) cam loc ((va ban) OR (van ban)) cua cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. ((hieu va) or (hieu qua)) cam loc ((va ban) OR (van ban)) cua cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu va) or (hieu qua)) cam loc ((va ban) OR (van ban)) cua cua triet*.