Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
lap lai » lap tai, lay lai, lam lai
hieu va » lieu va, hieu qua
ky sang » ky nang, ky tang, duy sang
ky dang » ky nang, ky danh
lap hai » lap tai, lap hoat, lanh hai
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
luc va » duc va, tuc va, loc va
so sac » so sach, so dac
va cam » va cham, va cac, va cao
cuc te » cua te, cuc thue, cuc tieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ((ky sang) or (ky dang)) ((lap hai) or (lap lai)). hieu va cam luc va hanh tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ((ky sang) OR (ky dang)) ((lap hai) OR (lap lai)). hieu va cam luc va hanh tai cuc te.
• Adding a wildcard symbol may retrieve word variants: so sac ((ky sang) or (ky dang)) ((lap hai) or (lap lai)). hieu va cam luc va hanh tai cuc te*.