Perhaps you should try some spelling variations:
thien van » thi van
van hanh » van thanh, ban hanh, van anh
tham duc » pham duc, tham du, than duc
van tham » van thanh, van tuan, van chat
sach ky » sac ky, sach y, sach kem
duc van » duc va, duc tan, duc manh
luu tre » luu tru, cuu tre, luy tre
nang xa » lang xa, nang ma, mang xa
sach ty » sach y, sach tu, sach thu
vi luu » vi lua

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: tu ((sach ky) OR (sach ty)) ((nang xa) OR (nang x)) hoi. thien van tham duc van hanh vi luu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach ty)) ((nang xa) OR (nang x)) hoi. thien van tham duc van hanh vi luu tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) ((nang xa) OR (nang x)) hoi. thien van tham duc van hanh vi luu tre*.