Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cau tren » cu tren, dau tren, ca tren
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
hieu te » hieu ve, hien te, hieu he
va hanh » van hanh, va danh, ban hanh
te ban » te bao
ban co » ban do, san co
vi cau » va cau, ve cau, di cau

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 te ban co ((va hanh) or (va thanh)) vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu te ban co ((va hanh) OR (va thanh)) vi cau tren.
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu te ban co ((va hanh) or (va thanh)) vi cau tren*.