Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, nam truc
pham thuc » phap thuc, pham chuc, nham thuc
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ho » nang hoc, nang co, tang ho
hieu vu » hieu va, hieu ve, hieu su
van han » van hanh, van phan, van nhan
han tap » han tai, toan tap, nhan tai
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) or (pham thuc)) van han tap va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ho hoi. hieu vu ((cham truc) OR (pham thuc)) van han tap va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ho hoi. hieu vu ((cham truc) or (pham thuc)) van han tap va triet*.