Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cao » van dao, van bao, van hao
danh vi » hanh vi, dinh vi, danh va
danh di » danh du, xanh di, danh dien
su va » su van, tu va
tru » truc

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 ky nang xa hoi. hieu van cao su va ((danh vi) OR (danh di)) luu tru~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu van cao su va ((danh vi) OR (danh di)) luu tru".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu van cao su va ((danh vi) OR (danh di)) luu tru*.