Perhaps you should try some spelling variations:
thien van » thi van
van thuat » va thuat, van thuan, van tuan
thuat duc » thuat duoc, thuat doc, thuat thuc
danh cau » danh dau, danh ca, danh hau
su triet » su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
su viet » so viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. thien van thuat duc va danh cau ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. thien van thuat duc va danh cau ((su triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. thien van thuat duc va danh cau ((su triet) or (su viet))*.