Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
dung sai » dung tai, dung va, dung dat
mai hoi » mai khoi, dai hoi, lai hoi
sach ty » sach y, sach tu, sach thu
hieu ha » hieu hoa, hieu va, hieu ca
xa dung » xay dung, xa dong, va dung
ty nang » ky nang, ty xang, ty hang
tu sach » thu sach, su sach, te sach
ma hoi » xa hoi, ma hoa, me hoi
thu xa » thu xac, thu ha, thu xe

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 ((ma hoi) or (mai hoi)). hieu ha nam thu xa dung sai ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((ma hoi) OR (mai hoi)). hieu ha nam thu xa dung sai ((cua triet) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((ma hoi) or (mai hoi)). hieu ha nam thu xa dung sai ((cua triet) OR (cua viet))*".