Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
qua cam » qua cham, qua cac, qua cai
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
qua ca » qua cac, qua cua, qua cai
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: so sach ky nang xa hoi. hieu ((qua cam) or (qua ca)) tu va hanh ((di cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu ((qua cam) OR (qua ca)) tu va hanh ((di cua) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu ((qua cam) or (qua ca)) tu va hanh ((di cua) or (vai cua)) tre*.