Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, pham thu
nham thuc » nhan thuc, nam thuc, nham thu
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
hanh van » thanh van, khanh van, hanh va
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu vi » hieu voi, hieu va, hieu ve
su tien » su kien, su hien, tu tieng
van su » dan su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky nang cao hoi. hieu vi ((pham thuc) or (nham thuc)) van hanh van su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang cao hoi. hieu vi ((pham thuc) OR (nham thuc)) van hanh van su tien.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang cao hoi. hieu vi ((pham thuc) or (nham thuc)) van hanh van su tien*.