Perhaps you should try some spelling variations:
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac loc » cac lop, cac toc, cac hoc
va hang » van hang, va nang, va lang
dau cua » day cua, cau cua, dan cua
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
loc va » hoc va, luc 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 (sac ky)) nang xa hoi. hieu ve cac loc va hang ((dau cua) OR (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) nang xa hoi. hieu ve cac loc va hang ((dau cua) OR (dai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sac ky)) nang xa hoi. hieu ve cac loc va hang ((dau cua) OR (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) nang xa hoi. hieu ve cac loc va hang ((dau cua) OR (dai cua)) triet*.