Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
phan duy » pham duy, phan huy, phan duc
minh doi » tinh doi, minh di, minh don
cua viet » ca viet, hoa viet, cua vat
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hac duy » pham duy

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang x ho. hieu van ((hac duy) or (phan duy)) van minh doi ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang x ho. hieu van ((hac duy) OR (phan duy)) van minh doi ((cua triet) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang x ho. hieu van ((hac duy) or (phan duy)) van minh doi ((cua triet) OR (cua viet))*".