Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
day nhanh » day thanh, duy nhanh, dac nhan
dat thanh » dao thanh, dat khanh, dang thanh
vu khach » vu khanh, vu khac, vay khach
vu sach » vu bach, su sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
di cua » dai cua, doi cua, de cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (vu khach)) ky nang x hoi. hieu ve cham thuc ((dat thanh) or (day nhanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ky nang x hoi. hieu ve cham thuc ((dat thanh) OR (day nhanh)) di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) ky nang x hoi. hieu ve cham thuc ((dat thanh) or (day nhanh)) di cua te".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) ky nang x hoi. hieu ve cham thuc ((dat thanh) or (day nhanh)) di cua te*.