Perhaps you should try some spelling variations:
dung sai » dung tai, dung va, dung dat
tu sach » thu sach, su sach, te sach
ty nang » ty xang, ty hang, ly nang
hieu le » hieu ve, hieu he, hieu ly
xa dung » xay dung, xa dong, va dung
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
le nam » ly nam, he nam, le na
thu xa » thu xac, thu ha, thu xe
cua cu » cua chu, cua cau, cua su

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