Perhaps you should try some spelling variations:
thanh hoi » thanh hoai, thanh hoa, thanh hai
thuat san » thuat toan, thuat song, thuat lanh
ve triet » va trien, su triet
va thanh » gia thanh, ban thanh, va tinh
cac bac » cac bai, cac ban, cac cach
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cac dac » cac dan, cac dai, cac tac
hoi ve » hoi va, moi ve, noi ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thuat san)) ky nang xa hoi. hieu ve ((cac dac) or (cac bac)) va thanh hoi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat san)) ky nang xa hoi. hieu ve ((cac dac) OR (cac bac)) va thanh hoi ve triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat san)) ky nang xa hoi. hieu ve ((cac dac) or (cac bac)) va thanh hoi ve triet*.