Perhaps you should try some spelling variations:
thoi kien » thoi hien, thoi mien, thoai lien
kien truc » kien thuc
nhung mot » nhung mon, nhu mot, dung mot
nhung bi » nhung bai, nhung gi
truc may » tren may, truc va
mot luan » mot lan, mot quan, mong luan
qua van » quan van, qua ban, qua san
luan va » luan van, luat va
bi qua » bo qua, bi quang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( nhung bi qua van. thoi kien truc may ) OR ( nhung mot luan va. thoi kien truc may ))~.
• Adding a wildcard symbol may retrieve word variants: (( nhung bi qua van. thoi kien truc may ) or ( nhung mot luan va. thoi kien truc may ))*.