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
sach ty » sach y, sach tu, sach thu
te sach » toc 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: te sach ty nang ((ho hoi) or (hoc 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: te sach ty nang ((ho hoi) OR (hoc hoi)). hieu vu cham truc van ((phan tap) OR (phan lap)) va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((ho hoi) or (hoc hoi)). hieu vu cham truc van ((phan tap) or (phan lap)) va triet*.