Perhaps you should try some spelling variations:
dang hung » dang quang, manh hung, dang cong
ban hanh » ban hang
su triet » su viet, su tien, ve triet
vu sach » vu bach, vu khach
su sach » so sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
vai su » va su, van su, lai su
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (su sach)) ky nang xa hoi. hieu va am thuc ((dang hung) or (ban hanh)) vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ky nang xa hoi. hieu va am thuc ((dang hung) OR (ban hanh)) vai su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) ky nang xa hoi. hieu va am thuc ((dang hung) or (ban hanh)) vai su triet*".