Perhaps you should try some spelling variations:
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cac duc » cac du, cac dac, cao duc
duc qua » duc quan, duc quy, luc quan
y nang » ky nang, ly nang, v nang
te cua » le cua, de cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu va cac duc qua (kinh OR dinh) te cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu va cac duc qua (kinh OR dinh) te cua te".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu va cac duc qua (kinh OR dinh) te cua te*.