Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
tan hanh » tan thanh, tang hanh, toan hanh
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
lang ha » long ha
lang xa » dang xay, lang van
cuu tre » cua tre, cau tren, cau treo

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 tu ((lang xa) OR (lang ha)) hoi. hieu van cam duc tan hanh lai ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu ((lang xa) OR (lang ha)) hoi. hieu van cam duc tan hanh lai ((cua triet) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu ((lang xa) OR (lang ha)) hoi. hieu van cam duc tan hanh lai ((cua triet) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach tu ((lang xa) OR (lang ha)) hoi. hieu van cam duc tan hanh lai ((cua triet) or (cuu tre))*.