Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hoa tinh » hoa sinh, hoa binh, ha tinh
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
truc va » thuc va, thuc vat, trung va
so sanh » do sanh
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) or (hoa tinh)) v nang ma hoi. hieu ((va cam) or (ve cac)) truc va tinh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (hoa tinh)) v nang ma hoi. hieu ((va cam) OR (ve cac)) truc va tinh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (hoa tinh)) v nang ma hoi. hieu ((va cam) or (ve cac)) truc va tinh vi cua viet*.