Perhaps you should try some spelling variations:
dung sai » dung tai, dung va, dung dat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
xa dung » xay dung, xa dong, va dung
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa
le tai » le thi, ly tai, te tai
thu xa » thu xac, thu ha, thu xe
le ta » le va

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 ky nang ma hoi. hieu ((le tai) or (le ta)) thu xa dung sai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu ((le tai) OR (le ta)) thu xa dung sai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu ((le tai) or (le ta)) thu xa dung sai cuu tre*.