Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tren » sach tien, sach tranh
duong mat » duong ma, luong mat, duong manh
tren hoc » truyen hoc, trung hoc, triet hoc
thuc anh » thuc hanh, thuy anh, thu anh
mat tinh » may tinh, man tinh, sat tinh
su sach » so sach, vu sach
hoa tan » hoa dan, hoa van, hoa han
hoa tin » hoa tinh, hoat tinh, hoa sinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tren hoc chuyen đe ky thuat: kien thuc anh ((hoa tan) or (hoa tin)) duong mat tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tren hoc chuyen đe ky thuat: kien thuc anh ((hoa tan) OR (hoa tin)) duong mat tinh.
• Adding a wildcard symbol may retrieve word variants: su sach tren hoc chuyen đe ky thuat: kien thuc anh ((hoa tan) or (hoa tin)) duong mat tinh*.