Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
va triet » va thiet, va trien, ve triet
phan lap » phan dau
phan tap » han tap, pha tap, phan tu
truc van » truc va, thuc van, truc ban
nang hoi » nang noi, nang hoc, nang ho
tu sach » thu sach, te sach, tu cach
hieu vu » hieu va, hieu ve, hieu su
hoi hoi » hoi hoc, hoc hoi, hoi doi
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
vu cham » va cham, vu kham, tu cham

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) or (su sach)) ty nang hoi hoi. hieu vu cham truc van ((phan tap) or (phan lap)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang hoi hoi. hieu vu cham truc van ((phan tap) OR (phan lap)) va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang hoi hoi. hieu vu cham truc van ((phan tap) or (phan lap)) va triet*.