Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, thanh san
cua triet » cua viet, su triet, va triet
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
sac ky » cac ky, sai ky
cac lo » cac lop, cac co, cac bo
lo va » lo van, lao va, ly va

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

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