Perhaps you should try some spelling variations:
mang xa » mang may, dang xay, mang cua
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, cua triet
tu van » tu va
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua

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

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