Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh doi » thanh doi, hanh noi, hang doi
pham duy » pham duc
cham duc » pham duc, cham soc, phan duc
hieu ve » hieu va
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
ty nang » ky nang, ty xang, ty hang
doi cua » dai cua, hoi cua, dong cua
tu sach » thu sach, su sach, te sach
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. ((hieu ve) OR (hieu van)) ((cham duc) or (pham duy)) va hanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. ((hieu ve) OR (hieu van)) ((cham duc) OR (pham duy)) va hanh doi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. ((hieu ve) OR (hieu van)) ((cham duc) or (pham duy)) va hanh doi cua triet*".