Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
tu sach » thu sach, su sach, te sach
ky dang » ky danh
hieu ve » hieu va, hieu van
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
hai hoa » thai hoa, dai hoa, cai hoa
lai hoa » dai hoa, loai hoc
ve cam » ve cham, ve cac, va cam

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 ((ky dang) or (ky nang)) xa hoi. hieu ve cam cuc ban thanh ((hai hoa) OR (lai hoa)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky nang)) xa hoi. hieu ve cam cuc ban thanh ((hai hoa) OR (lai hoa)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky dang) or (ky nang)) xa hoi. hieu ve cam cuc ban thanh ((hai hoa) OR (lai hoa)) viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dang) or (ky nang)) xa hoi. hieu ve cam cuc ban thanh ((hai hoa) OR (lai hoa)) viet*.