Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va manh » van manh, va danh, va hanh
cua cua » cua chua, ca cua, cua cha
qua cua » quan cua, quang cua, qua quan
cam lo » nam lo, cam ly, cam o
lo va » lo van, lao va, ly va

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