Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
ban hang » ngan hang
su triet » su viet, su tien, ve triet
te sach » toc sach
dong xa » dong xay, duong xa, dong ha
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
ki su » ky 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 dong xa hoi. hieu ((ve cam) OR (ve cac)) xuc ((tuan anh) or (ban hang)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach van dong xa hoi. hieu ((ve cam) OR (ve cac)) xuc ((tuan anh) OR (ban hang)) ki su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach van dong xa hoi. hieu ((ve cam) OR (ve cac)) xuc ((tuan anh) or (ban hang)) ki su triet".
• Adding a wildcard symbol may retrieve word variants: te sach van dong xa hoi. hieu ((ve cam) OR (ve cac)) xuc ((tuan anh) or (ban hang)) ki su triet*.