Perhaps you should try some spelling variations:
tuong uoc » huong uoc, tuong hoc, truong quoc
hieu lang » chieu sang, hieu quang, nhieu tang
doi tuong » moi truong, doi song
nhung tri » nhung bai, dung tri, nhung bi
den lang » den nang, den bang, ten lang
thi hieu » thi chieu, thi hien, thi dieu
boi dung » boi duong, noi dung, hoi dung
dung hoc » dong hoc, dung thuoc, trung hoc
tri den » tri ben, trinh den, tri benh
hoc mo » hoc moi, hoc mot, hoc mon

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( (phung or phuong) thi hieu lang. boi dung hoc mo ) or ( nhung tri den lang. doi tuong uoc mo ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( (phung OR phuong) thi hieu lang. boi dung hoc mo ) OR ( nhung tri den lang. doi tuong uoc mo )).
• Adding a wildcard symbol may retrieve word variants: (( (phung or phuong) thi hieu lang. boi dung hoc mo ) or ( nhung tri den lang. doi tuong uoc mo ))*.