Perhaps you should try some spelling variations:
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
va lanh » va lang, va danh, va hanh
dao cua » dai cua, day cua, dan cua
sac ky » cac ky, sai ky
ve cao » va cao, ve bao, ve co
ve cac » va cac, vien cac
cua te » cua tu

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

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