Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
su sach » vu sach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
qua dam » cua dam, qua da, dua dam
va hanh » van hanh, va thanh, va danh
dam tu » nam tu, cam tu, tam tu
va dan » ca dan, va dao, va dau
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) or (so sach)) ky nang xa hoi. hieu qua dam tu ((va hanh) or (va dan)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang xa hoi. hieu qua dam tu ((va hanh) OR (va dan)) vi su triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang xa hoi. hieu qua dam tu ((va hanh) or (va dan)) vi su triet*.