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 dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
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 dang xa hoi. hieu qua cam ((luc va) or (loc va)) vanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang 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 dang xa hoi. hieu qua cam ((luc va) or (loc va)) vanh dai cua triet*.