Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
van hanh » van thanh, ban hanh, van anh
tang tai » hang tai, dung tai, sang tao
va hanh » va thanh, va danh, ban hanh
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
va cam » va cham, va cac, va cao
sac ky » cac ky, sai 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: tu sac ky ((sang lap) or (tang tai)) hoi. hieu va cam xuc ((va hanh) or (van hanh)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((sang lap) OR (tang tai)) hoi. hieu va cam xuc ((va hanh) OR (van hanh)) vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((sang lap) or (tang tai)) hoi. hieu va cam xuc ((va hanh) or (van hanh)) vi cua tu*.