Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cac qua » tac quan
duc ban » duc tan, duc van, dua ban
va pham » van pham, va phat, va phap
su sach » so sach, vu sach
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
hieu va » lieu va, hieu qua
ha hoi » hoa hoi, ha noi, xa hoi

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 lang) or (ky dang)) ha hoi. hieu va pham duc ban thanh ((cac qua) OR (cau qua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky dang)) ha hoi. hieu va pham duc ban thanh ((cac qua) OR (cau qua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) or (ky dang)) ha hoi. hieu va pham duc ban thanh ((cac qua) OR (cau qua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) or (ky dang)) ha hoi. hieu va pham duc ban thanh ((cac qua) OR (cau qua)) triet*.