Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van chat » cao chat
danh dai » danh dau, danh sai, vanh dai
su triet » su viet, su tien, ve triet
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)) su 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)) su 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)) su triet*.