Perhaps you should try some spelling variations:
trinh nhiet » trinh thiet, trinh nghien, trinh triet
trinh viet » ninh viet, trinh vat
cho nguoi » cua nguoi
hoc tieng » hoc hien
tieng han » tieng anh
qua danh » qua dan, luan danh, luat danh
viet nma » viet nami, viet nhat, viet nam
viet nm » viet nam, viet nami, viet anh

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 viet) or (trinh nhiet)) qua danh cho nguoi ((viet nma) or (viet nm)) hoc tieng han~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao ((trinh viet) OR (trinh nhiet)) qua danh cho nguoi ((viet nma) OR (viet nm)) hoc tieng han.
• Adding a wildcard symbol may retrieve word variants: giao ((trinh viet) or (trinh nhiet)) qua danh cho nguoi ((viet nma) or (viet nm)) hoc tieng han*.