Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
van chuyen » cau chuyen, van chien
thuoc sach » hoc sach, nuoc sach, thuat sach
sanh tren » sach tren, lanh tren, sinh tren
sach khoa » bach khoa, sach nha, anh khoa
khoa than » khoa luan, hoa thai, hoa tan
tren van » trien van, tran van, tien van
so sanh » do sanh
cung va » dung va, vung va, cung la
cong va » dong va, cong ha, cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh tren van chuyen đe ky thuat: kien thuoc sach khoa than ((cung va) or (cong va)) tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh tren van chuyen đe ky thuat: kien thuoc sach khoa than ((cung va) OR (cong va)) tinh.
• Adding a wildcard symbol may retrieve word variants: so sanh tren van chuyen đe ky thuat: kien thuoc sach khoa than ((cung va) or (cong va)) tinh*.