Perhaps you should try some spelling variations:
su sach » so sach, vu sach
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
qua cac » cua cac
cua tre » cua te, cuu tre, cua triet
qua cam » qua cham, qua ca, qua cai
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua

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 (ly nang)) xa hoi. hieu ((qua cam) or (qua cac)) tuc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) xa hoi. hieu ((qua cam) OR (qua cac)) tuc va hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ly nang)) xa hoi. hieu ((qua cam) or (qua cac)) tuc va hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ly nang)) xa hoi. hieu ((qua cam) or (qua cac)) tuc va hanh di cua tre*.