Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
hoc chuyen » khong chuyen
thuoc sach » hoc sach, nuoc sach, thuat sach
sanh tren » sach tren, lanh tren, sinh tren
tren hoc » truyen hoc, trung hoc, triet hoc
sach hoa » sach ha, sach hoi, bach hoa
van cong » van phong, phan cong, van duong
so sanh » do sanh
ha dinh » ha tinh, va dinh, ba dinh

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 hoc chuyen đe ky thuat: kien thuoc sach hoa ((van cong) OR (van dong)) ha dinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh tren hoc chuyen đe ky thuat: kien thuoc sach hoa ((van cong) OR (van dong)) ha dinh".
• Adding a wildcard symbol may retrieve word variants: so sanh tren hoc chuyen đe ky thuat: kien thuoc sach hoa ((van cong) OR (van dong)) ha dinh*.