Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
day nhanh » duy nhanh, dac nhan, day manh
cam thuc » am thuc, nam thuc, cam thu
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
cua tu » cua tuc, cua su, cua cu
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 ky nang x hoi. hieu ve cam thuc ((day thanh) or (day nhanh)) di ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. hieu ve cam thuc ((day thanh) OR (day nhanh)) di ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang x hoi. hieu ve cam thuc ((day thanh) or (day nhanh)) di ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu ve cam thuc ((day thanh) or (day nhanh)) di ((cua te) OR (cua tu))*.