Perhaps you should try some spelling variations:
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cau treo » cau theo, cau tren, cau triet
su sach » so sach, vu sach
so sanh » do sanh
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
qua cac » cua cac
va hanh » van hanh, va thanh, va danh
vi cau » va cau, ve cau, di cau

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)) va ((nang xa) OR (lang xa)) hoi. hieu qua cac nuoc va hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) va ((nang xa) OR (lang xa)) hoi. hieu qua cac nuoc va hanh vi cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) va ((nang xa) OR (lang xa)) hoi. hieu qua cac nuoc va hanh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) va ((nang xa) OR (lang xa)) hoi. hieu qua cac nuoc va hanh vi cau treo*.