Perhaps you should try some spelling variations:
quoc tuan » quoc quan, quoc toan, quoc quang
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
cac quoc » cac nuoc, cac cuoc, cao quoc
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
thai va » thai van

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky dang xa hoi. hieu vien cac quoc tuan anh ((mai va) or (thai va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang xa hoi. hieu vien cac quoc tuan anh ((mai va) OR (thai va)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xa hoi. hieu vien cac quoc tuan anh ((mai va) or (thai va)) triet*.