Perhaps you should try some spelling variations:
thien hieu » thien nhien, thien chien, thien hue
hieu cac » hieu luc, hieu va, hieu van
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
tu tieng » luc tieng, tu tuong, tu trong
nang xa » nang x, lang xa, nang ma
va hanh » va thanh, va danh, ban hanh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang xa hoi. thien hieu cac nuoc ((va hanh) or (van hanh)) van ((su triet) or (tu tieng))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. thien hieu cac nuoc ((va hanh) OR (van hanh)) van ((su triet) OR (tu tieng)).
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. thien hieu cac nuoc ((va hanh) or (van hanh)) van ((su triet) or (tu tieng))*.