Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
thu sach » tu sach, thuat sach, thuoc sach
thuc ban » thuoc ban, thuc dan, thu ban
cua viet » ca viet, hoa viet, cua vat
hang xa » hoang xa, hang va, lang xa
hang ca » hang va, nang cao, hang tai
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
vai cua » dai cua, hai cua, lai cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach thieu ((hang xa) or (hang ca)) hoi. hieu ve cham thuc ban thanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thieu ((hang xa) OR (hang ca)) hoi. hieu ve cham thuc ban thanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: thu sach thieu ((hang xa) or (hang ca)) hoi. hieu ve cham thuc ban thanh vai cua viet*.