Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
mang xa » lang xa, mang may, dang xay
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cam luc » cam xuc, cau luc
vi cua » vai cua, di cua
va dan » ca dan, va dao, va dau
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ve cam » ve cham, ve cac, va cam

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

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