Perhaps you should try some spelling variations:
su sach » so sach, vu sach
hoi cua » hoi chuc
hai cua » thai cua, dai cua, lai cua
cao luc » bao luc, cao duc, cao suc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sanh » do sanh
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau
va cao » va cac, va co, va dao

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) or (so sanh)) ky lang xa hoi. hieu va cao luc va dan ((hai cua) OR (hoi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ky lang xa hoi. hieu va cao luc va dan ((hai cua) OR (hoi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) ky lang xa hoi. hieu va cao luc va dan ((hai cua) OR (hoi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ky lang xa hoi. hieu va cao luc va dan ((hai cua) OR (hoi cua)) tre*.