Perhaps you should try some spelling variations:
te sach » toc sach
ky sang » ky nang, ky dang, ky tang
ky danh » ky anh, ky dang
qua cau » quan cau, qua cac, qua ca
cau luc » cau truc, cau phuc
lat cua » luat cua, lai cua, lam cua
mat cua » ma cua, manh cua, mang cua
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: te sach ((ky sang) or (ky danh)) xa hoi. hieu qua cau luc va dan ((lat cua) OR (mat cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky sang) OR (ky danh)) xa hoi. hieu qua cau luc va dan ((lat cua) OR (mat cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky sang) or (ky danh)) xa hoi. hieu qua cau luc va dan ((lat cua) OR (mat cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky sang) or (ky danh)) xa hoi. hieu qua cau luc va dan ((lat cua) OR (mat cua)) te*.