Perhaps you should try some spelling variations:
thanh nghia » thanh nghi, thanh nga, thanh nha
nghia cua » nghiep cua, nghia xa, nghia duy
vu khach » vu khanh, vu khac, vay khach
da thanh » dao thanh, dat thanh, dam thanh
cam thuc » am thuc, nam thuc, cam thu
vu sach » vu bach, su sach
thuc da » thuc dan, thuc day, thuc dia
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
ve cam » ve cham, ve cac, va cam
o hoi » co hoi, o hoc, o hai

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: ((vu sach) OR (vu khach)) ((ty nang) OR (ty hang)) o hoi. hieu ve cam thuc da thanh nghia cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (vu khach)) ((ty nang) OR (ty hang)) o hoi. hieu ve cam thuc da thanh nghia cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khach)) ((ty nang) OR (ty hang)) o hoi. hieu ve cam thuc da thanh nghia cua tre*.