Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van chat » cao chat
danh dai » danh dau, danh sai, vanh dai
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
truc va » thuc vat, trung va
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
nang xa » nang x, lang xa, nang ma
danh di » danh du, xanh di, danh dien

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 nang xa hoi. hieu van chat ((truc va) OR (thuc va)) ((danh dai) or (danh di)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu van chat ((truc va) OR (thuc va)) ((danh dai) OR (danh di)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu van chat ((truc va) OR (thuc va)) ((danh dai) or (danh di)) cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu van chat ((truc va) OR (thuc va)) ((danh dai) or (danh di)) cua triet*.