Perhaps you should try some spelling variations:
trong tinh » truong tinh, trong kinh, trong sinh
dong trong » duong trong, dung trong, cong trong
hieu sach » chieu sach, hieu cach, dien sach
doc hieu » toc thieu, hoc thieu, hoc hien
anh bang » anh hoang, anh quang, tinh bang
cua dong » chua dong, cua cong, cua dang
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sach - ((canh tranh) or (anh bang)) cua dong trong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - ((canh tranh) OR (anh bang)) cua dong trong tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - ((canh tranh) or (anh bang)) cua dong trong tinh toan ban*.