Perhaps you should try some spelling variations:
dang xay » dang van, van xay
cua tre » cua te, cuu tre, cua triet
va danh » va dan, va hanh, dia danh
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
hieu le » hieu ve, hieu he, hieu ly
va dinh » van dinh, va kinh, va tinh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
le am » le ham, le nam, le a

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) or (dang xay)) hoi. hieu le am thuc ((va danh) OR (va dinh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (dang xay)) hoi. hieu le am thuc ((va danh) OR (va dinh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) or (dang xay)) hoi. hieu le am thuc ((va danh) OR (va dinh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (dang xay)) hoi. hieu le am thuc ((va danh) OR (va dinh)) vai cua tre*.