Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan
vu sac » vu sach, vu san, va sac
vi cua » vai cua, di cua
cua te » cua tu
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ((ky lang) OR (ky tang)) xa hoi. hieu ve am ((thuc va) or (thuc day)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ((ky lang) OR (ky tang)) xa hoi. hieu ve am ((thuc va) OR (thuc day)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ((ky lang) OR (ky tang)) xa hoi. hieu ve am ((thuc va) or (thuc day)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu sac ((ky lang) OR (ky tang)) xa hoi. hieu ve am ((thuc va) or (thuc day)) hanh vi cua te*.