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