Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh tam » thanh tai, thanh tay, thanh nam
khanh duc » khanh duy, khanh quoc, anh duc
va thanh » gia thanh, ban thanh, va tinh
vu khanh » vu thanh, van khanh, duy khanh
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
mai hoi » mai khoi, dai hoi, lai hoi
ty tang » tay tang, ty xang, ty hang
hieu vu » hieu va, hieu ve, hieu su
ma hoi » xa hoi, ma hoa, me hoi

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 tang ((ma hoi) or (mai hoi)). hieu vu khanh duc va thanh tam ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty tang ((ma hoi) OR (mai hoi)). hieu vu khanh duc va thanh tam ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty tang ((ma hoi) or (mai hoi)). hieu vu khanh duc va thanh tam ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty tang ((ma hoi) or (mai hoi)). hieu vu khanh duc va thanh tam ((cua tre) OR (cua triet))*.