Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
so sinh » so sanh, cho sinh, hoa sinh
nang ma » tang ma, sang ma, nang cao
so tinh » o tinh, so tin, hoi tinh
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
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: ((so sinh) or (so tinh)) v nang ma hoi. hieu ((ve cam) or (ve cac)) truc va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sinh) OR (so tinh)) v nang ma hoi. hieu ((ve cam) OR (ve cac)) truc va hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: ((so sinh) or (so tinh)) v nang ma hoi. hieu ((ve cam) or (ve cac)) truc va hanh vi cua viet*.