Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cuoc luc » coc luc, duoc lac, duoc luu
dang xay » dang van, van xay
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
lang xa » lang ha, lang van
hieu va » lieu va, hieu qua
luc va » duc va, tuc va, loc va
cua te » cua tu

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 ky ((lang xa) OR (dang xay)) hoi. hieu va cuoc luc va tinh vi ((cua te) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((lang xa) OR (dang xay)) hoi. hieu va cuoc luc va tinh vi ((cua te) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((lang xa) OR (dang xay)) hoi. hieu va cuoc luc va tinh vi ((cua te) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((lang xa) OR (dang xay)) hoi. hieu va cuoc luc va tinh vi ((cua te) or (su triet))*.