Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
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, hieu qua
cac duc » cac du, cao duc, cac nuoc
cac dac » cac dan, cac dai, cac bac
vi cua » vai cua, di cua
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 ky nang xa hoi. hieu va ((cac duc) OR (cac dac)) ((van thanh) or (tuan anh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu va ((cac duc) OR (cac dac)) ((van thanh) OR (tuan anh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu va ((cac duc) OR (cac dac)) ((van thanh) or (tuan anh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu va ((cac duc) OR (cac dac)) ((van thanh) or (tuan anh)) vi cua triet*.