Perhaps you should try some spelling variations:
thieu nien » thien nhien
ve triet » va trien
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
su triet » su tien
nuoc van » nuoc va, nuoc san, luoc van
van hanh » van thanh, ban hanh, van anh
nien cac » vien cac, dien cac, bien cac
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
su viet » so viet
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. thieu nien cac nuoc van hanh vi ((((su triet) OR (su viet))) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. thieu nien cac nuoc van hanh vi ((((su triet) OR (su viet))) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. thieu nien cac nuoc van hanh vi ((((su triet) OR (su viet))) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. thieu nien cac nuoc van hanh vi ((((su triet) OR (su viet))) or (ve triet))*.