Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
thuc dan » thuc hanh, hoc dan, thuc vat
dan tich » dan dich, dan tinh, dau tich
lang xa » lang ha, dang xay
hieu ve » hieu va, hieu van
co thuc » do thuc, co thua, mo thuc
cua tre » cua te, cuu tre, cua triet
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
va cua » va chua, via cua, ca cua
ve co » vo co, va co, de co

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky ((lang xa) or (lang van)) hoi. hieu ve co thuc dan tich va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky ((lang xa) OR (lang van)) hoi. hieu ve co thuc dan tich va cua tre.
• Adding a wildcard symbol may retrieve word variants: su xac ky ((lang xa) or (lang van)) hoi. hieu ve co thuc dan tich va cua tre*.