Perhaps you should try some spelling variations:
trinh thiet » trinh thi
trinh viet » ninh viet, trinh vat
vien nhan » vien than, trien nhan, vien nganh
kinh cua » sinh cua, tinh cua, dinh cua
hoc vien » hoc hien, hoc viet, hoc tieng
viet ha » viet nam
ha hoc » hoa hoc, nha hoc, va hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: giao ((trinh thiet) or (trinh viet)) qua kinh cua nguoi viet ha hoc vien nhan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao ((trinh thiet) OR (trinh viet)) qua kinh cua nguoi viet ha hoc vien nhan.
• Adding a wildcard symbol may retrieve word variants: giao ((trinh thiet) or (trinh viet)) qua kinh cua nguoi viet ha hoc vien nhan*.