Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
dang mai » dang hai, dang mau, dang bai
hieu van » hieu va, lieu va
ky dang » ky nang, ky danh
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va
sach ky » sac ky, sach y, sach ty
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky dang mai hoi. ((hieu ve) or (((hieu van) OR (thien van)))) cam xuc va thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky dang mai hoi. ((hieu ve) OR (((hieu van) OR (thien van)))) cam xuc va thanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky dang mai hoi. ((hieu ve) or (((hieu van) OR (thien van)))) cam xuc va thanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ky dang mai hoi. ((hieu ve) or (((hieu van) OR (thien van)))) cam xuc va thanh dai cua te*.