Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
y nang » ky nang, ly nang, v nang
tuan » quan, tran, luan

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