Perhaps you should try some spelling variations:
vat dung » van dung, va dung, viet dung
cuu tre » cua tre, cau tren, cau treo
tai cuu » tai cuc, tai buu, tai cua
cam tuc » cam xuc, nam thuc, dam thuc
hieu va » lieu va, hieu qua
lang xa » dang xay, lang van
lang ha » long ha
sai ky » sac ky
cam tu » cam thu, nam tu, dam tu
tu sai » tu bai, tu san, tu cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((lang xa) or (lang ha)) hoi. hieu va ((cam tuc) OR (cam tu)) vat dung tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((lang xa) OR (lang ha)) hoi. hieu va ((cam tuc) OR (cam tu)) vat dung tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((lang xa) or (lang ha)) hoi. hieu va ((cam tuc) OR (cam tu)) vat dung tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((lang xa) or (lang ha)) hoi. hieu va ((cam tuc) OR (cam tu)) vat dung tai cuu tre*.