Perhaps you should try some spelling variations:
sang lai » sang tai, sang lap, mang lai
chat luc » chat xuc, chat lua, nhan luc
lai roi » lai hoi, loi roi
hieu vu » hieu va, hieu ve, hieu su
vu chat » va chat, ve chat, du chat
va hanh » van hanh, va thanh, va danh
sai ky » sac ky
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cac ky) OR (sai ky)) sang lai roi. hieu vu chat luc va hanh vi ((cua tu) OR (cua su))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((cac ky) or (sai ky)) sang lai roi. hieu vu chat luc va hanh vi ((cua tu) OR (cua su))~".
• Adding a wildcard symbol may retrieve word variants: tu ((cac ky) or (sai ky)) sang lai roi. hieu vu chat luc va hanh vi ((cua tu) OR (cua su))*.