Perhaps you should try some spelling variations:
su sach » so sach, vu sach
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
sach ly » sach y, sach lo, sach ty
cac tuc » cac toc, cac tu, cac tac
qua cac » cua cac
ly nang » ky nang, ly hang, ly vang
cuu tre » cua tre, cau tren, cau treo
co cuu » co cau, co cua, co chu

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 ly nang ((le hoi) or (ma hoa)). hieu qua cac tuc ((va danh) or (va hanh)) co cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ((le hoi) OR (ma hoa)). hieu qua cac tuc ((va danh) OR (va hanh)) co cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ly nang ((le hoi) or (ma hoa)). hieu qua cac tuc ((va danh) or (va hanh)) co cuu tre*.