Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
tieu sach » chieu sach, dien sach, te sach
trung hoc » trung quoc
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
tran van » luan van
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - hanh ((trung hoc) or (tran van)) thong cong manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh ((trung hoc) OR (tran van)) thong cong manh toan tap.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ((trung hoc) or (tran van)) thong cong manh toan tap*.