Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham
cua te » cua tu

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: te sach y ((nang ma) OR (nang x)) hoi. hieu v pham duc va hanh lai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang ma) or (nang x)) hoi. hieu v pham duc va hanh lai ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang ma) or (nang x)) hoi. hieu v pham duc va hanh lai ((cua tre) OR (cua te))*.