Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
va chinh » tai chinh, te chinh
cham xuc » cam xuc, chat xuc, cham soc
lang may » mang may, bang may, lang mai
hieu va » lieu va, hieu qua
sach tu » sach thu, sach ty, sach uu
may hoi » may thoi, tay hoi, mai hoi
cach tu » cach thuc
hieu ve » hieu van
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 tu) OR (cach tu)) lang may hoi. ((hieu ve) or (hieu va)) cham xuc va chinh tri va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tu) OR (cach tu)) lang may hoi. ((hieu ve) OR (hieu va)) cham xuc va chinh tri va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach tu) OR (cach tu)) lang may hoi. ((hieu ve) or (hieu va)) cham xuc va chinh tri va triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach tu) OR (cach tu)) lang may hoi. ((hieu ve) or (hieu va)) cham xuc va chinh tri va triet*.