Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
hanh tai » thanh tai, hang tai, han tai
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
bac tuc » bac tu, bac thua
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
tai su » tai so, tai tu, lai 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 (co sach)) y nang xa hoi. lieu va ((bac tuc) or (bach tuoc)) va hanh tai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) y nang xa hoi. lieu va ((bac tuc) OR (bach tuoc)) va hanh tai su triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) y nang xa hoi. lieu va ((bac tuc) or (bach tuoc)) va hanh tai su triet*.