Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dang xay » van xay
nam thuc » nam thuoc, am thuc, nam thu
dang van » hoang van, hang va
toc sac » toc sach, toc san, hoc sach
vai cuu » vai cua
dan vai » dan va, dan tai, dan vat
dan dan » dang dan, ban dan, dao dan
hieu va » lieu va, hieu qua
lang xa » lang ha, lang van
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky ((lang xa) or (((dang xay) or (dang van)))) hoi. hieu va nam thuc dan dan vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky ((lang xa) OR (((dang xay) OR (dang van)))) hoi. hieu va nam thuc dan dan vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sac ky ((lang xa) or (((dang xay) or (dang van)))) hoi. hieu va nam thuc dan dan vai cuu tre*.