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