Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
cac loc » cac lop, cac toc, cac hoc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
mang xa » mang may, dang xay, mang cua
ve cac » va cac, vien cac
te cac » tu cac, te cao, de cac
loc va » hoc va, luc va
vi cua » vai cua, di cua
te sac » te sach, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) OR (te cac)) ky ((mang xa) or (lang xa)) hoi. hieu ve cac loc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te cac)) ky ((mang xa) OR (lang xa)) hoi. hieu ve cac loc va hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te cac)) ky ((mang xa) or (lang xa)) hoi. hieu ve cac loc va hanh vi cua tre*".