Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
hoi cua » hoi chuc
coi cua » cuoi cua, doi cua, co cua
va tinh » may tinh
cam luc » cam xuc, cau luc
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao

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 ty ((nang xa) or (nang ma)) hoi. lieu va cam luc va tinh ((coi cua) or (hoi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (nang ma)) hoi. lieu va cam luc va tinh ((coi cua) OR (hoi cua)) tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang xa) or (nang ma)) hoi. lieu va cam luc va tinh ((coi cua) or (hoi cua)) tre*.