Perhaps you should try some spelling variations:
thanh loi » thanh hoa, thanh hai, thanh lap
hang tai » hang va, dung tai
su sach » so sach, vu sach
duc ban » duc tan, duc van, dua ban
cua tre » cuu tre, cua triet, dua tren
luc ban » cuc ban, luc bat, luc van
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
tai hoi » tai khoi, dai hoi, tai hai
ky hang » ky nang, ly hang, ky dang
cua te » cua tu

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 ky hang tai hoi. hieu ve cham ((luc ban) OR (duc ban)) thanh loi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky hang tai hoi. hieu ve cham ((luc ban) OR (duc ban)) thanh loi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky hang tai hoi. hieu ve cham ((luc ban) OR (duc ban)) thanh loi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ky hang tai hoi. hieu ve cham ((luc ban) OR (duc ban)) thanh loi ((cua tre) or (cua te))*.