Perhaps you should try some spelling variations:
van hieu » cao hieu
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac luc » cau luc, coc luc, cac nuoc
hieu va » lieu va, hieu qua
cach le » cach de, cach ben, cach lam
van hoe » van hoa, van hoc, van hien
luc va » duc va, tuc va, loc va
cac le » cac he, mac le, bac le
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((cach le) OR (cac le)) lang ((van hoe) or (van hieu)). hieu va cac luc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cach le) OR (cac le)) lang ((van hoe) OR (van hieu)). hieu va cac luc va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((cach le) OR (cac le)) lang ((van hoe) or (van hieu)). hieu va cac luc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((cach le) OR (cac le)) lang ((van hoe) or (van hieu)). hieu va cac luc va hanh vai cua te*.