Perhaps you should try some spelling variations:
thieu nien » thien nhien
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
cac toc » cac nuoc, cac thoi
cac toi » cac thoi
vi su » va su, ve su, ki su

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 toc) OR (cac toi)) van hanh vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. thieu nien ((cac toc) OR (cac toi)) van hanh vi su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. thieu nien ((cac toc) OR (cac toi)) van hanh vi su triet*.