Perhaps you should try some spelling variations:
thien van » thi van
thuc dan » thuc hanh, hoc dan
dieu cua » dieu tra
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty mang » ty xang, ty hang, tin mang
mang xa » lang xa, mang may, dang xay
van am » van nam, van lam, van dam
de cua » le cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty mang xa hoi. thien van am ((thuc dan) or (thuc vat)) thanh ((de cua) or (dieu cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty mang xa hoi. thien van am ((thuc dan) OR (thuc vat)) thanh ((de cua) OR (dieu cua)) te.
• Adding a wildcard symbol may retrieve word variants: vu sach ty mang xa hoi. thien van am ((thuc dan) or (thuc vat)) thanh ((de cua) or (dieu cua)) te*.