Perhaps you should try some spelling variations:
trinh nhiet » trinh thiet, trinh nghien, trinh viet
nhiet qua » nhiet cua, hieu qua, khien qua
hien han » hien hanh, hien huan, dien han
qua dan » qua danh, qua ban, cua dan
dan cua » dan ca, ban cua, dai cua
viet nm » viet nam, viet nami, viet anh
nm hoc » am hoc, n1 hoc, n3 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 nm hoc hien han~.
• Adding a wildcard symbol may retrieve word variants: giao trinh nhiet qua dan cua nguoi viet nm hoc hien han*.