Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc day
cu tren » tu tren, dua tren
nang ma » tang ma, sang ma, nang cao
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
dan di » danh di, dan da, dan de
va dao » ca dao
di cu » di cau, di cua, di du

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 cam) or (va dao)) ((thuc va) or (thuc dan)) dan di cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu ((va cam) OR (va dao)) ((thuc va) OR (thuc dan)) dan di cu tren.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu ((va cam) or (va dao)) ((thuc va) or (thuc dan)) dan di cu tren*.