Perhaps you should try some spelling variations:
danh doi » danh di, thanh doi, dung doi
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
vu khac » vu kham, vu khanh, bui khac
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
doi su » oi su, don su, voi su
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu khac)) ky nang xa hoi. hieu ve am thuc va danh doi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khac)) ky nang xa hoi. hieu ve am thuc va danh doi su triet*.