Perhaps you should try some spelling variations:
thu sang » thu hang, thu san, thu bang
hoc duoc » hoc nuoc, hoa duoc, hoc dung
vai cua » dai cua, hai cua, lai cua
dan vai » dan va, dan tai, dan vat
cac xuc » cam xuc, cac nuoc, chat xuc
sang ky » sang kyo, dang ky, tang ky
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
va xay » va xac
va dan » ca dan, va dao, va dau
va xa » va xac, va xu, va da

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 ((va xa) or (va xay)) hoi. hieu ve ((cac xuc) or (hoc duoc)) va dan vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sang ky ((va xa) OR (va xay)) hoi. hieu ve ((cac xuc) OR (hoc duoc)) va dan vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sang ky ((va xa) or (va xay)) hoi. hieu ve ((cac xuc) or (hoc duoc)) va dan vai cua tre*.