Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu 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
lam cua » lam chat
ve cac » va cac

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 hoi. hieu ((ve cac) or (vien cac)) duc va thanh ((lam cua) OR (nam cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu ((ve cac) OR (vien cac)) duc va thanh ((lam cua) OR (nam cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. hieu ((ve cac) or (vien cac)) duc va thanh ((lam cua) OR (nam cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu ((ve cac) or (vien cac)) duc va thanh ((lam cua) OR (nam cua)) triet*.