Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cham truc » cau truc, nham thuc, nam truc
van phong » van dong, hai phong
phong lap » phong la, phong lam, thong lap
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ho » nang hoc, nang co, tang ho
hieu vu » hieu va, hieu ve, hieu su
ho hoi » hoc hoi, hoa hoi, hoi hoi
lap ve » dap ve, lap va, tap ve

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 ky nang ho hoi. hieu vu ((cham truc) or (pham thuc)) van phong lap ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ho hoi. hieu vu ((cham truc) OR (pham thuc)) van phong lap ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ho hoi. hieu vu ((cham truc) or (pham thuc)) van phong lap ve triet*.