Perhaps you should try some spelling variations:
hien hanh » dieu hanh
doanh dan » doanh ban, doanh van, doanh dao
bieu hien » dieu hien, dieu khien, bien phien
hanh mao » hanh ma, hanh mau, hanh may
va doanh » van doanh, vay doanh, va danh
cua tre » cuu tre, cua triet, dua tren
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
mao va » mao van, tao va, cao va
cua te » cua tu

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 xa hoi. bieu hien hanh mao va doanh dan ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. bieu hien hanh mao va doanh dan ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang xa hoi. bieu hien hanh mao va doanh dan ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. bieu hien hanh mao va doanh dan ((cua tre) OR (cua te))*.