Perhaps you should try some spelling variations:
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cac toc » cac toi, cac nuoc, cac thoi
va dinh » van dinh, va kinh, va tinh
dinh ca » dinh cac, dinh cua, dinh cao
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
toc va » hoc va, toc ta, tuc va
ca cua » co cua
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 ((y nang) or (v nang)) ((le hoi) or (ma hoa)). hieu va cac toc va dinh ca cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) ((le hoi) OR (ma hoa)). hieu va cac toc va dinh ca cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (v nang)) ((le hoi) or (ma hoa)). hieu va cac toc va dinh ca cua te*.