Perhaps you should try some spelling variations:
thien van » thi van
cua triet » su triet, va triet
van hanh » van thanh, ban hanh, van anh
hanh han » hanh nhan, hanh phan, hanh san
cua viet » ca viet, hoa viet, cua vat
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
so sac » so sach, so dac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky lang xa hoi. ((thien van) or (hieu va)) bac xuc van hanh han ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky lang xa hoi. ((thien van) OR (hieu va)) bac xuc van hanh han ((cua triet) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky lang xa hoi. ((thien van) or (hieu va)) bac xuc van hanh han ((cua triet) OR (cua viet))*".