Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cac tru » ca tru, cac tro, cac thu
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
cua te » cua tu

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 dang xa hoi. hieu va cac tru ((va danh) OR (va hanh)) sai ((su triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang xa hoi. hieu va cac tru ((va danh) OR (va hanh)) sai ((su triet) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang xa hoi. hieu va cac tru ((va danh) OR (va hanh)) sai ((su triet) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang xa hoi. hieu va cac tru ((va danh) OR (va hanh)) sai ((su triet) or (cua te))*.