Perhaps you should try some spelling variations:
trinh nhiet » trinh thiet, trinh nghien, trinh viet
nhiet qua » nhiet cua, hieu qua, khien qua
hien hanh » dieu hanh
qua dan » qua danh, qua ban, cua dan
dan cua » dan ca, ban cua, dai cua
viet am » viet nam, viet a, viet nm
am hoc » ad 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 nhiet qua dan cua nguoi viet am hoc hien hanh~.
• Adding a wildcard symbol may retrieve word variants: giao trinh nhiet qua dan cua nguoi viet am hoc hien hanh*.