Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach cua » mach cua, cach cua, sac cua
cua dang » cua cong, cua ban
qua chao » qua cham, qua cho, qua khao
te sach » toc sach
dang xa » dang xay, lang xa, dang ha
doan vi » doan va, don vi, doan thi
xu van » tu van, vu van, su van
dan vi » don vi, dan va, gan vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach cua dang xa hoi. hieu qua chao xu van ((dan vi) or (doan vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach cua dang xa hoi. hieu qua chao xu van ((dan vi) OR (doan vi)) cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach cua dang xa hoi. hieu qua chao xu van ((dan vi) or (doan vi)) cua triet*.