Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh dai » thanh hai, thanh tai, thanh dat
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nuoc van » nuoc va, nuoc san, luoc van
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach y) or (sac ky)) ((nang xa) OR (nang x)) hoi. hieu va cac nuoc van thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sac ky)) ((nang xa) OR (nang x)) hoi. hieu va cac nuoc van thanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach y) or (sac ky)) ((nang xa) OR (nang x)) hoi. hieu va cac nuoc van thanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sac ky)) ((nang xa) OR (nang x)) hoi. hieu va cac nuoc van thanh dai cua tre*.