Perhaps you should try some spelling variations:
doi tuong » moi truong, doi song
nhung tri » nhung bai, dung tri, nhung bi
tuong hoc » truong hoc, tuong ho, duong hoc
lan nang » luan nang, van nang, ban nang
noi dung » hoc dung
dung hoc » dong hoc, dung thuoc, trung hoc
tri gian » tri gia, toi gian, tri giam
gian dan » gian lang
thi lan » thi hanh, thi nang, thi lien
hoc noi » hoc nuoc
phung » phuong, chung, phong

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( phung thi lan nang. noi dung hoc noi ) or ( nhung tri gian dan. doi tuong hoc noi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( phung thi lan nang. noi dung hoc noi ) OR ( nhung tri gian dan. doi tuong hoc noi )).
• Adding a wildcard symbol may retrieve word variants: (( phung thi lan nang. noi dung hoc noi ) or ( nhung tri gian dan. doi tuong hoc noi ))*.