Perhaps you should try some spelling variations:
thanh than » thanh thanh, thanh thang, thanh toan
cua triet » su triet, va triet
hieu van » hieu va, thien van, hieu ve
va thanh » gia thanh, ban thanh, va tinh
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc 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: su sach ky nang xa hoi. ((hieu van) or (lieu va)) bac xuc va thanh than ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu van) OR (lieu va)) bac xuc va thanh than ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. ((hieu van) or (lieu va)) bac xuc va thanh than ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu van) or (lieu va)) bac xuc va thanh than ((cua triet) OR (cua viet))*.