Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
nam thuc » nam thuoc, am thuc, nam thu
dao hanh » dao thanh, dang hanh, ban hanh
di cua » dai cua, doi cua, de cua
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 khach ky nang x hoi. ((lieu va) or (hieu qua)) nam thuc ((dao hanh) or (day thanh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang x hoi. ((lieu va) OR (hieu qua)) nam thuc ((dao hanh) OR (day thanh)) di cua triet.
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang x hoi. ((lieu va) or (hieu qua)) nam thuc ((dao hanh) or (day thanh)) di cua triet*.