Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham truc » cau truc, nham thuc, pham thuc
phan tap » phan lap, han tap, phan tu
truc ban » thuc ban, truc dan, truc van
sach ty » sach y, sach tu, sach thu
pha tap » pham tai
tu sach » thu sach, su sach, te sach
hieu vu » hieu va, hieu ve, hieu su
hoc hoi » hoc khoi, hoc hoa, hoc noi
ty nang » ky nang, ty xang, ty hang
vu cham » va cham, vu kham, tu cham
ho hoi » hoa hoi, hoi hoi, co 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 ((ho hoi) or (hoc hoi)). hieu vu cham truc ban ((phan tap) OR (pha tap)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((ho hoi) OR (hoc hoi)). hieu vu cham truc ban ((phan tap) OR (pha tap)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((ho hoi) or (hoc hoi)). hieu vu cham truc ban ((phan tap) OR (pha tap)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((ho hoi) or (hoc hoi)). hieu vu cham truc ban ((phan tap) OR (pha tap)) cua triet*.