Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh hai » thanh hoa, thanh san
su sach » so sach, vu sach
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang ha » long ha
ve cam » ve cham, ve cac, va cam

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: su sach ky ((nang x) OR (lang ha)) hoi. hieu ve cam duc va ((thanh hai) OR (thanh phan)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang x) or (lang ha)) hoi. hieu ve cam duc va ((thanh hai) OR (thanh phan)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang x) or (lang ha)) hoi. hieu ve cam duc va ((thanh hai) OR (thanh phan)) cua tre*.