Perhaps you should try some spelling variations:
sach luan » sach han, san luan
tuan thuc » thuan thuc, toan thuc, tuan thu
pho gian » pho giao, thoi gian, cho giang
qua tiep » qua tieu, cua tiep, qua dieu
tiep cua » tiep can, tap cua, tiep va
dieu tra » dieu tri, kiem tra
gian van » giang van, gian dan, gian lan
ban thuc » ban thuoc, dan thuc, van thuc
van tuan » van quan, anh tuan
tieu thu » trieu thi, tieu su
van tieu » van hieu, van tien, vay tieu
cap qua » cau qua, cac qua, cay qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( pho gian van tieu thu ) or ((( pho gian van tuan thuc ) or ( pho gian van ban thuc ))))) or ((( pho cap qua tiep cua ) or ((( pho ((sach luan) OR (sach luyen)) dieu cua ) or ( pho ((sach luan) OR (sach luyen)) dieu tra ))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( pho gian van tieu thu ) OR ((( pho gian van tuan thuc ) OR ( pho gian van ban thuc ))))) OR ((( pho cap qua tiep cua ) OR ((( pho ((sach luan) OR (sach luyen)) dieu cua ) OR ( pho ((sach luan) OR (sach luyen)) dieu tra ))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( pho gian van tieu thu ) or ((( pho gian van tuan thuc ) or ( pho gian van ban thuc ))))) or ((( pho cap qua tiep cua ) or ((( pho ((sach luan) OR (sach luyen)) dieu cua ) or ( pho ((sach luan) OR (sach luyen)) dieu tra ))))))*".