Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
dang xay » dang van, van xay
hoat tuc » hoang tuc, luat tuc, hoat quy
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
nang xa » nang x, lang xa, nang ma
te sach » toc sach
tuc va » thuc va, truc va, tuc xa
qua » quan

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 ((nang xa) or (dang xay)) hoi. hieu qua hoat tuc va hanh va ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (dang xay)) hoi. hieu qua hoat tuc va hanh va ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (dang xay)) hoi. hieu qua hoat tuc va hanh va ((cua triet) or (va triet))*.