Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, lai hoi, mai doi
dai hoi » dai hoc, dai moi
dai hai » dai han, dai tai, dai thao
hieu ve » hieu va, hieu van
dat cuu » dat cau, dat cua
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ((((mai hoi) OR (dai hoi))) or (dai hai)). hieu ve cam xuc va thanh dat cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((((mai hoi) OR (dai hoi))) OR (dai hai)). hieu ve cam xuc va thanh dat cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((((mai hoi) OR (dai hoi))) or (dai hai)). hieu ve cam xuc va thanh dat cuu tre*".