Perhaps you should try some spelling variations:
trinh nhiet » trinh thiet, trinh nghien, trinh viet
trach nhiem » trac nghiem
canh trinh » canh tranh, hanh trinh, canh tinh
sach trach » sach tranh, sach truc, sat trach
nhiem quoc » nghiem quoc, nhiem cuoc, nghiem duoc
tu canh » thu canh, tu chanh, tu can
nhiet d » nhiet do, nhiet de, nhiet doi
tu sach » thu sach, su sach, te sach
d hoc » du hoc, ad hoc, de hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu canh trinh nhiet d hoc ) or ( tu sach trach nhiem quoc hoi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu canh trinh nhiet d hoc ) OR ( tu sach trach nhiem quoc hoi ))*.