Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua chat » qua nhat, qua cham, luan chat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
dan day » da day, dan dat, dan da
day cua » dai cua
soc va » hoc va, goc va, uoc va
doc va » duoc va, hoc va, duc va
loc va » hoc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu qua chat ((((soc va) OR (doc va))) or (loc va)) dan day cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu qua chat ((((soc va) OR (doc va))) OR (loc va)) dan day cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu qua chat ((((soc va) OR (doc va))) or (loc va)) dan day cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu qua chat ((((soc va) OR (doc va))) or (loc va)) dan day cua triet*.