Perhaps you should try some spelling variations:
huong doi » huong dan, dung doi
so sach » bo sach, co sach, hoc sach
cac tuc » cac toc, cac tu, cac tac
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
so sanh » do sanh
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: ((so sach) OR (so sanh)) ty nang xa hoi. hieu ve cac tuc xa ((huong doi) or (trong doi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ty nang xa hoi. hieu ve cac tuc xa ((huong doi) OR (trong doi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) ty nang xa hoi. hieu ve cac tuc xa ((huong doi) or (trong doi)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (so sanh)) ty nang xa hoi. hieu ve cac tuc xa ((huong doi) or (trong doi)) cua te*.