Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh cat » hanh cac, hanh luat, nhanh cay
va hanh » van hanh, va thanh, va danh
bao luc » bao thuc
cao luc » cao duc, cao suc, cau luc
hieu va » lieu va, hieu qua
su sach » so sach
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
vu sach » vu bach, vu khach
cat va » chat va, cat van, dat va

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)) ty nang xa hoi. hieu va ((cao luc) OR (bao luc)) va hanh cat va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty nang xa hoi. hieu va ((cao luc) OR (bao luc)) va hanh cat va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ty nang xa hoi. hieu va ((cao luc) OR (bao luc)) va hanh cat va triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ty nang xa hoi. hieu va ((cao luc) OR (bao luc)) va hanh cat va triet*.