Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
bach ho » bach hoa, bach ha, bach khoa
bac ho » bac bo, bac ha
va nam » van nam, ha nam, va nay
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: tu ((bach ho) OR (bac ho)) nang x hoi. lieu va nam thuc hanh ((hanh di) or (hanh de)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((bach ho) OR (bac ho)) nang x hoi. lieu va nam thuc hanh ((hanh di) OR (hanh de)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((bach ho) OR (bac ho)) nang x hoi. lieu va nam thuc hanh ((hanh di) or (hanh de)) va triet".
• Adding a wildcard symbol may retrieve word variants: tu ((bach ho) OR (bac ho)) nang x hoi. lieu va nam thuc hanh ((hanh di) or (hanh de)) va triet*.