Perhaps you should try some spelling variations:
te sach » toc sach
danh vi » hanh vi, dinh vi, danh di
hieu ve » hieu va, hieu van
luu tre » luu tru, cuu tre, luy tre
nang ma » tang ma, sang ma, nang cao
tuc va » thuc va, truc va, tuc xa
vi luu » vi lua
ve cac » va cac, vien cac

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 x) OR (nang ma)) hoi. hieu ve cac ((duc va) OR (tuc va)) danh vi luu tre~.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang x) or (nang ma)) hoi. hieu ve cac ((duc va) or (tuc va)) danh vi luu tre*.