Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh va, hanh tai, hanh van
van cham » van chat, van tham, va cham
soc van » hoc van, oc van, sac van
lang ha » long ha
xac ky » cac ky, sac ky
bac ky » cac ky, ban ky, sac ky
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((xac ky) OR (bac ky)) lang ha noi. hieu van cham soc van ((hanh vai) or (hanh vi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((xac ky) OR (bac ky)) lang ha noi. hieu van cham soc van ((hanh vai) OR (hanh vi)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((xac ky) OR (bac ky)) lang ha noi. hieu van cham soc van ((hanh vai) or (hanh vi)) cua tu".
• Adding a wildcard symbol may retrieve word variants: su ((xac ky) OR (bac ky)) lang ha noi. hieu van cham soc van ((hanh vai) or (hanh vi)) cua tu*.