Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
trinh thi » trinh tai, dinh thi, trinh tu
tong cong » trong cong, cong cong, dung cong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
nhung bo » nhung bi, nhung bai, nhung don
dan phan » doan phan, dan chan, van phan
phan tap » phan lap, han tap, pha tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - hanh ((trinh thuat) or (trinh thi)) ((nhung bo) or (tong cong)) dan phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - hanh ((trinh thuat) OR (trinh thi)) ((nhung bo) OR (tong cong)) dan phan tap.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hanh ((trinh thuat) or (trinh thi)) ((nhung bo) or (tong cong)) dan phan tap*.