Perhaps you should try some spelling variations:
cach thuc » anh thuc
su triet » su viet, su tien, ve triet
cac thu » cac thoi
sach ky » sac ky, sach y, sach kem
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
va dan » ca dan, va dao, va dau
dan va » doan va, dan ca, ban va

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) or (sach ty)) nang xa hoi. hieu ve ((cac thu) OR (cach thuc)) va dan va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) nang xa hoi. hieu ve ((cac thu) OR (cach thuc)) va dan va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach ty)) nang xa hoi. hieu ve ((cac thu) OR (cach thuc)) va dan va su triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach ty)) nang xa hoi. hieu ve ((cac thu) OR (cach thuc)) va dan va su triet*.