Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
qua chet » quan chet, qua nhat, qua cham
sach van » sach han, sach va, bach van
quan che » quan he, han che, quan ha
van nang » van quang, van ban, van dong
nang xa » nang x, lang xa, nang ma
duoc va » duc va, duoc ma, duong va
te sach » toc sach
dan vi » doan vi, don vi, dan va
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach van nang xa hoi. hieu ((qua chet) or (quan che)) ((duoc va) OR (nuoc va)) dan vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach van nang xa hoi. hieu ((qua chet) OR (quan che)) ((duoc va) OR (nuoc va)) dan vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach van nang xa hoi. hieu ((qua chet) or (quan che)) ((duoc va) OR (nuoc va)) dan vi su triet".
• Adding a wildcard symbol may retrieve word variants: te sach van nang xa hoi. hieu ((qua chet) or (quan che)) ((duoc va) OR (nuoc va)) dan vi su triet*.