Perhaps you should try some spelling variations:
nganh ky » nganh y, nganh xay, hanh ky
sanh ky » hanh ky, sang ky, thanh ky
hieu va » lieu va, hieu qua
suc gia » duc gia, luc gia, tuc gia
co suc » cao suc, co su, cong suc
va cua » va chua, via cua, ma cua
ca cua » co cua
x hoi » xa hoi, o hoi, x ho
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sanh ky) or (nganh ky)) nang x hoi. hieu va co suc gia thanh ((va cua) OR (ca cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sanh ky) OR (nganh ky)) nang x hoi. hieu va co suc gia thanh ((va cua) OR (ca cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sanh ky) or (nganh ky)) nang x hoi. hieu va co suc gia thanh ((va cua) OR (ca cua)) te*".