Perhaps you should try some spelling variations:
toan tu » toan du, tran tu, doan tu
tu nang » tru nang, tu nong, tu nano
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
va cam » va cham, va cac, va cao
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thuat toan tu nang ma hoa. hieu va cam duc va danh vi ((cua te) OR (cua tu))~.
• Adding a wildcard symbol may retrieve word variants: thuat toan tu nang ma hoa. hieu va cam duc va danh vi ((cua te) or (cua tu))*.