Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cam thu » nam thu, cac thu, ca thu
danh va » doanh va, hanh va, anh va
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
thu va » thuc va, thue va, tu va
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (su sach)) ky nang xa hoi. ((hieu ve) OR (hieu va)) cam thu va danh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (su sach)) ky nang xa hoi. ((hieu ve) OR (hieu va)) cam thu va danh va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (su sach)) ky nang xa hoi. ((hieu ve) OR (hieu va)) cam thu va danh va su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (su sach)) ky nang xa hoi. ((hieu ve) OR (hieu va)) cam thu va danh va su triet*.