Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
hanh danh » hanh doanh, han danh, anh danh
dien cua » dieu cua, dien cuc, dien cu
doc sac » doc sach, dac sac, hoc sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sac ky » cac ky, sai ky
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: doc sac ky nang x hoi. hieu va cham thuc hanh danh ((dien cua) or (tiep can)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sac ky nang x hoi. hieu va cham thuc hanh danh ((dien cua) OR (tiep can)) te.
• Adding a wildcard symbol may retrieve word variants: doc sac ky nang x hoi. hieu va cham thuc hanh danh ((dien cua) or (tiep can)) te*.