Perhaps you should try some spelling variations:
chat thien » phat trien, phat hien, chat dien
hanh lam » thanh lap, hanh kem, hanh va
su sach » so sach, vu sach
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
ha hoi » hoa hoi, ha noi, xa hoi
ve cac » vien 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 ha hoi. hieu ((ve cac) OR (va cac)) duc va hanh lam ((chat thien) or (cai thien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang ha hoi. hieu ((ve cac) OR (va cac)) duc va hanh lam ((chat thien) OR (cai thien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang ha hoi. hieu ((ve cac) OR (va cac)) duc va hanh lam ((chat thien) or (cai thien))".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang ha hoi. hieu ((ve cac) OR (va cac)) duc va hanh lam ((chat thien) or (cai thien))*.