Perhaps you should try some spelling variations:
thien cao » thien bao, thien cac, thien cau
ban hanh » ban hang
cao chao » chao chao, cao chat, cao cho
ty nang » ky nang, ty xang, ty hang
co sach » bo sach, cuon sach, hoc sach
so sach » so sanh, bo sach, hoc sach
xu ban » xuc ban, tu ban, vu ban
lam va » nam va, dam va, am va
lam ha » nam ha, dam ha, lam chat
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (co sach)) ty nang x hoi. thien cao chao xu ban hanh ((lam va) OR (lam ha)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ty nang x hoi. thien cao chao xu ban hanh ((lam va) OR (lam ha)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (co sach)) ty nang x hoi. thien cao chao xu ban hanh ((lam va) OR (lam ha)) triet*".