Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vanh dai » van dai, vanh tai, lanh dao
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
qua cam » qua cham, qua cac, qua ca
luc va » duc va, tuc va
loc va » hoc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang xa hoi. hieu qua cam ((luc va) OR (loc va)) vanh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu qua cam ((luc va) OR (loc va)) vanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu qua cam ((luc va) OR (loc va)) vanh dai cua triet*.