Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
thuc dan » thuc hanh, hoc dan, thuc vat
thuc ban » thuoc ban, thu ban, thuc van
su sach » so sach
doi cua » dai cua, hoi cua
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tu » cua tuc, cua su, cua cu
v nang » va nang, vu nang, van nang
va am » va lam, va cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) v nang xa hoi. hieu va am ((thuc ban) OR (thuc dan)) thanh doi cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) v nang xa hoi. hieu va am ((thuc ban) OR (thuc dan)) thanh doi cua tu~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) v nang xa hoi. hieu va am ((thuc ban) OR (thuc dan)) thanh doi cua tu*.