Perhaps you should try some spelling variations:
canh thuc » anh thuc, cach thuc, danh thuc
hieu viec » nhieu viec, hieu ve, sieu viet
hieu vien » hieu hien, thieu nien, hieu tieng
nang xay » dang xay, nganh xay, nang xuan
tu sach » thu sach, te sach, tu cach
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
thuc va » thuc vat, thuc dan, thuc day
chu tre » cho tre, chu tri, cuu tre
xay hoi » xa hoi, tay hoi, cay phoi
su sach » so sach, vu sach
va chu » va che, va cau, va chi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ky nang xay hoi. ((hieu vien) or (hieu viec)) canh thuc va tinh va chu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xay hoi. ((hieu vien) OR (hieu viec)) canh thuc va tinh va chu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang xay hoi. ((hieu vien) or (hieu viec)) canh thuc va tinh va chu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang xay hoi. ((hieu vien) or (hieu viec)) canh thuc va tinh va chu tre*.