Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban hanh » ban hang
van nang » van quang, van ban, van dong
cam luc » cam xuc
cau luc » cau truc, cau phuc
su sach » so sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, vu khach
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) or (vu sach)) van nang xa hoi. hieu ve ((cam luc) OR (cau luc)) ban hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) van nang xa hoi. hieu ve ((cam luc) OR (cau luc)) ban hanh vi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) van nang xa hoi. hieu ve ((cam luc) OR (cau luc)) ban hanh vi su triet*".