Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh dam » thanh dat, thanh nam, thanh tam
vu khanh » vu thanh, van khanh, duy khanh
hieu van » hieu va, thien van, lieu va
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
cac luc » cau luc, cac nuoc, cac cuoc
dam cua » dai cua, day cua, nam cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khanh) or (su sach)) ly nang xa hoi. hieu van ((cac luc) OR (coc luc)) gia thanh dam cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khanh) OR (su sach)) ly nang xa hoi. hieu van ((cac luc) OR (coc luc)) gia thanh dam cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu khanh) or (su sach)) ly nang xa hoi. hieu van ((cac luc) OR (coc luc)) gia thanh dam cua triet".
• Adding a wildcard symbol may retrieve word variants: ((vu khanh) or (su sach)) ly nang xa hoi. hieu van ((cac luc) OR (coc luc)) gia thanh dam cua triet*.