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
phan tap » phan lap, han tap, pha tap
van phan » van phong, van thanh, luan phan
sach ty » sach y, sach thu, xach tay
nang ho » nang hoc, nang co, tang ho
sach tu » sach thu, cach tu, sach uu
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 ty) OR (sach tu)) nang ho hoi. hieu vu ((cham truc) or (pham thuc)) van phan tap va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) nang ho hoi. hieu vu ((cham truc) OR (pham thuc)) van phan tap va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach tu)) nang ho hoi. hieu vu ((cham truc) or (pham thuc)) van phan tap va triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach tu)) nang ho hoi. hieu vu ((cham truc) or (pham thuc)) van phan tap va triet*.