Perhaps you should try some spelling variations:
hien hanh » dieu hanh
hieu hien » bieu hien, dieu hien, chieu chien
hanh mao » hanh ma, hanh mau, hanh may
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
dan cua » dan ca, dai cua, day cua
ban cua » ban quan
mao va » mao van, tao va, cao va

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