Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
trung ban » trong ban, trung van, trung can
cau trung » cau truong, cac trung, cao trung
phap lap » phan lap, phap lam, phap luat
hieu ve » hieu va, hieu van
lap cua » lai cua, tap cua, lam cua
tu sach » thu sach, su sach, te sach
hieu vu » hieu va, hieu su, dieu vu
ty nang » ty xang, ty hang, ly nang
ho hoi » hoc hoi, hoa hoi, hoi hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty nang) or (ky nang)) ho hoi. ((hieu vu) OR (hieu ve)) cau trung ban phap lap cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ky nang)) ho hoi. ((hieu vu) OR (hieu ve)) cau trung ban phap lap cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ky nang)) ho hoi. ((hieu vu) OR (hieu ve)) cau trung ban phap lap cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ky nang)) ho hoi. ((hieu vu) OR (hieu ve)) cau trung ban phap lap cua triet*.