Perhaps you should try some spelling variations:
hieu suat » hieu luat, hieu qua
suat chat » sat chat, soat chat, luan chat
sang tai » hang tai, sang tao, tang tai
hanh vai » hanh vi, hanh va, hanh tai
xuc van » duc van, xuc ban, thuc van
luc van » luoc van, luu van, duc van
ky sang » ky nang, ky dang, ky tang
tai hoi » tai khoi, dai hoi, tai hai
vai cua » dai cua, hai cua, lai cua
vuc van » duc van, thuc van, chuc van
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
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 san ky sang tai hoi. hieu suat chat ((((xuc van) OR (vuc van))) or (luc van)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky sang tai hoi. hieu suat chat ((((xuc van) OR (vuc van))) OR (luc van)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky sang tai hoi. hieu suat chat ((((xuc van) OR (vuc van))) or (luc van)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu san ky sang tai hoi. hieu suat chat ((((xuc van) OR (vuc van))) or (luc van)) hanh vai cua te*.