Perhaps you should try some spelling variations:
thanh hinh » thanh binh, thanh tinh, thanh vinh
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
xua ban » xuat ban, cua ban, qua ban
nam xua » nam cua, nam mua, nam qua
tu sach » thu sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
va nam » van nam, ha nam, va nay
o hoi » co hoi, o hoc, o hoa
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ty nang ((o hoi) OR (o hai)). lieu va nam xua ban thanh hinh su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang ((o hoi) OR (o hai)). lieu va nam xua ban thanh hinh su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ty nang ((o hoi) OR (o hai)). lieu va nam xua ban thanh hinh su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang ((o hoi) OR (o hai)). lieu va nam xua ban thanh hinh su triet*.