Perhaps you should try some spelling variations:
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
qua cam » qua cham, qua ca, qua cai
qua cac » cua cac
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
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 xa hoi. hieu ((qua cam) or (qua cac)) tuc va hanh di ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ((qua cam) OR (qua cac)) tuc va hanh di ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ((qua cam) or (qua cac)) tuc va hanh di ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ((qua cam) or (qua cac)) tuc va hanh di ((cua tre) OR (cua te))*.