Perhaps you should try some spelling variations:
thuc hach » thuc hanh, chuc hach, thuc cach
hach toan » thanh toan, manh toan
toan phan » thanh phan, toan ban, hoa phan
phan hung » phan chung, phan ung, phan hong
hung han » chung han, hung ha, hung dan
han tinh » hanh tinh, nhan tinh, ha tinh
tu sach » thu sach, su sach, te sach

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 ((tin hoc) or (sinh hoc)) chuyen đe ky thuat: kien thuc hach toan phan hung han tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tin hoc) OR (sinh hoc)) chuyen đe ky thuat: kien thuc hach toan phan hung han tinh.
• Adding a wildcard symbol may retrieve word variants: tu sach ((tin hoc) or (sinh hoc)) chuyen đe ky thuat: kien thuc hach toan phan hung han tinh*.