Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
sang tao » hang tai
van hanh » van thanh, ban hanh, van anh
cham tuc » nham thuc, pham thuc, tham thuc
van cham » van chat, van tham, va cham
tuc van » thuc van, truc van, tuc va
cu tren » tu tren, dua tren
nang ma » tang ma, sang ma, nang cao
san ky » sang ky, van ky, dan ky
tai cu » tai cuc, tai cua, tai co
tu san » thu san, tu ban, tu can

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 tao) or (nang ma)) hoi. hieu van cham tuc van hanh tai cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((sang tao) OR (nang ma)) hoi. hieu van cham tuc van hanh tai cu tren.
• Adding a wildcard symbol may retrieve word variants: tu san ky ((sang tao) or (nang ma)) hoi. hieu van cham tuc van hanh tai cu tren*.