Perhaps you should try some spelling variations:
tinh khong » tinh khang, tinh huong, benh khong
tin khong » tien khong, thinh khong, trinh khong
khoa phan » hoa phan, khoa than, khoa phau
phan cung » phan cong, phan ung, phan xuong
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
cung hay » cong hay, cung may, chung han
hay tinh » may tinh, ha tinh, huy tinh
su sach » so sach, vu sach

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 ((tin khong) or (tinh khong)) chuyen đe ky thuat: kien thuc anh khoa phan cung hay tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tin khong) OR (tinh khong)) chuyen đe ky thuat: kien thuc anh khoa phan cung hay tinh.
• Adding a wildcard symbol may retrieve word variants: su sach ((tin khong) or (tinh khong)) chuyen đe ky thuat: kien thuc anh khoa phan cung hay tinh*.