Perhaps you should try some spelling variations:
su sach » so sach, vu sach
hai cua » thai cua, dai cua, hoi cua
dan hai » doan hai, dang hai, dan khai
cao luc » bao luc, cao duc, cao suc
qua cao » qua cac, qua ca, qua cai
lang ha » long ha
lang xa » dang xay, lang van
so sanh » do sanh
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau

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) or (lang ha)) hoi. hieu qua cao luc va dan hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ky ((lang xa) OR (lang ha)) hoi. hieu qua cao luc va dan hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ky ((lang xa) or (lang ha)) hoi. hieu qua cao luc va dan hai cua tre*.