Perhaps you should try some spelling variations:
trong hoi » trong thoi, truong hoi, trong choi
cua viet » ca viet, hoa viet, cua vat
xa trong » xa truong, ca trong, va trong
hoi cua » hoi chuc
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
so sach » bo sach, co sach, hoc sach
nang xa » lang xa, nang ma, mang xa
so sanh » do sanh
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) OR (so sanh)) ky ((nang xa) or (nang x)) hoi. hieu va cam tuc xa trong hoi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky ((nang xa) OR (nang x)) hoi. hieu va cam tuc xa trong hoi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) ky ((nang xa) or (nang x)) hoi. hieu va cam tuc xa trong hoi cua viet".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (so sanh)) ky ((nang xa) or (nang x)) hoi. hieu va cam tuc xa trong hoi cua viet*.