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