Perhaps you should try some spelling variations:
ban hanh » ban hang
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
ve cham » va cham, vu cham, ve chim
ve chat » va chat, van chat
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho
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: su sach v nang x hoi. hieu ((ve cham) OR (ve chat)) xuc ((van ban) or (ban hanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang x hoi. hieu ((ve cham) OR (ve chat)) xuc ((van ban) OR (ban hanh)) vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang x hoi. hieu ((ve cham) OR (ve chat)) xuc ((van ban) or (ban hanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: su sach v nang x hoi. hieu ((ve cham) OR (ve chat)) xuc ((van ban) or (ban hanh)) vi su triet*.