Perhaps you should try some spelling variations:
thu sang » thu hang, thu san, thu bang
hieu van » hieu va, thien van, lieu va
ban hang » ngan hang
sang ky » sang kyo, dang ky, tang ky
nam dua » nam da, nam mua, nam qua
hang vi » hang va, hanh vi, hang di
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, me hoi
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sang ky nang ((ma hoi) or (ma hoa)). hieu van ((nam dua) or (nam cua)) ban hang vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sang ky nang ((ma hoi) OR (ma hoa)). hieu van ((nam dua) OR (nam cua)) ban hang vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu sang ky nang ((ma hoi) or (ma hoa)). hieu van ((nam dua) or (nam cua)) ban hang vi cuu tre*.