Perhaps you should try some spelling variations:
phap trinh » phap tinh, lap trinh, phap sinh
cua triet » cua viet, su triet, va triet
trinh bao » trinh dao, trinh ban, trinh bay
hoc phap » hoc phan, hoc phat, hoc pho
hieu van » hieu va, thien van, lieu va
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
lam hoc » am hoc, lam hoa, tam hoc
lang ha » long ha
cua tre » cua te, cuu tre, dua tren
van lam » van nam

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 ky ((lang ha) or (nang x)) hoi. hieu van lam hoc phap trinh bao ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((lang ha) OR (nang x)) hoi. hieu van lam hoc phap trinh bao ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((lang ha) or (nang x)) hoi. hieu van lam hoc phap trinh bao ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((lang ha) or (nang x)) hoi. hieu van lam hoc phap trinh bao ((cua tre) OR (cua triet))*.