Perhaps you should try some spelling variations:
thanh duong » thanh huong, thanh cuong, thanh vuong
hoc chuyen » khong chuyen
than duong » tuan duong, thao duong, han duong
sach tren » sach tien, sach tranh
tren hoc » truyen hoc, trung hoc, triet hoc
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
so sach » so sanh, bo sach, co sach
tinh » trinh, dinh, minh

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

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