Perhaps you should try some spelling variations:
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nang xa » lang xa, nang ma, mang xa
qua cac » cua cac
va danh » va dinh, va dan, va hanh
danh de » hanh de, dan de, dang de
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
de cua » le cua, te cua, dieu cua

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 qua cac nuoc va danh de 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 qua cac nuoc va danh de 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 qua cac nuoc va danh de cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sac ky)) ((nang xa) OR (nang x)) hoi. hieu qua cac nuoc va danh de cua tre*.