Perhaps you should try some spelling variations:
trinh dai » trinh tai, trinh di, trinh da
su triet » su viet, su tien, ve triet
nang lai » nang tai, mang lai, nang cai
va trinh » van trinh, va tinh, lap trinh
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
cam tuc » cam xuc, nam thuc, dam thuc
hieu ve » hieu va, hieu van
lai hoi » dai hoi, lai hoa, lai roi
ty nang » ky nang, ty xang, ty hang
cam tu » cam thu, nam tu, dam tu

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 lai hoi. hieu ve ((cam tuc) or (cam tu)) va trinh dai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang lai hoi. hieu ve ((cam tuc) OR (cam tu)) va trinh dai ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang lai hoi. hieu ve ((cam tuc) or (cam tu)) va trinh dai ((cua tre) or (su triet))*.