Perhaps you should try some spelling variations:
te sach » toc sach
va tinh » may tinh
va dinh » van dinh, va kinh, vu dinh
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
luu tre » luu tru, cuu tre, luy tre
ve cac » va cac, vien cac
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: te sach ky ((nang x) OR (nang ma)) hoi. hieu ve cac xuc ((va dinh) OR (va tinh)) vi luu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang x) or (nang ma)) hoi. hieu ve cac xuc ((va dinh) OR (va tinh)) vi luu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang x) or (nang ma)) hoi. hieu ve cac xuc ((va dinh) OR (va tinh)) vi luu tre*.