Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tren » sach tien, sach tranh
thuc bach » truc bach, thuoc sach, thuc hanh
thuc cach » thuoc sach, truoc cach, thuc hanh
phan cong » thanh cong
tren hoc » truyen hoc, trung hoc, triet hoc
cong mai » chong mai, cong hai, cong ma
mai minh » mai dinh, chi minh, van minh
tu sach » thu sach, su sach, te sach
ha phan » hoa phan, hai phan, va phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tren hoc chuyen đe ky thuat: kien ((thuc bach) or (thuc cach)) ha phan cong mai minh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tren hoc chuyen đe ky thuat: kien ((thuc bach) OR (thuc cach)) ha phan cong mai minh.
• Adding a wildcard symbol may retrieve word variants: tu sach tren hoc chuyen đe ky thuat: kien ((thuc bach) or (thuc cach)) ha phan cong mai minh*.