Perhaps you should try some spelling variations:
hieu hien » bieu hien, chieu chien, dieu khien
dieu hien » dieu khien, dieu kien, bieu hien
bach nhu » sach nha, bach hue, bac nha
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
bach du » bach dieu, bach hue, bach qua
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
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 ky nang xa hoi. ((hieu hien) OR (dieu hien)) ((bach du) or (bach nhu)) va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu hien) OR (dieu hien)) ((bach du) OR (bach nhu)) va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((hieu hien) OR (dieu hien)) ((bach du) or (bach nhu)) va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu hien) OR (dieu hien)) ((bach du) or (bach nhu)) va hanh vi cua te*.