Perhaps you should try some spelling variations:
thuat doc » thuat duoc, thuat do, thuat doi
van thuat » va thuat, van thuan, van tuan
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va hanh, dia danh
nang xa » nang x, lang xa, nang ma
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang xa hoi. hieu van thuat doc ((va danh) or (va dan)) cau ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu van thuat doc ((va danh) OR (va dan)) cau ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu van thuat doc ((va danh) or (va dan)) cau ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu van thuat doc ((va danh) or (va dan)) cau ((cua triet) OR (su triet))*.