Perhaps you should try some spelling variations:
dau tren » dat tren, dau tieng, dau trong
dau tien » van tien
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
nay tuc » nay tu, cay thuc, day thuc
xa hanh » xa thanh, xa khanh, va hanh
ma hoi » mai hoi, xa hoi, ma hoa
va nay » va ngay, va cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ma hoi. hieu va nay tuc xa hanh vi ((dau tren) or (dau tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu va nay tuc xa hanh vi ((dau tren) OR (dau tien)).
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu va nay tuc xa hanh vi ((dau tren) or (dau tien))*.