Perhaps you should try some spelling variations:
hien hanh » dieu hanh
hanh duoc » hanh thuoc, nganh duoc, doanh duoc
hieu hien » bieu hien, dieu hien, chieu chien
hai cua » thai cua, dai cua, hoi cua
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
so sach » bo sach, co sach, hoc sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sanh » do sanh
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (so sanh)) ky lang xa hoi. hieu hien hanh duoc ((va danh) OR (va dinh)) hai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky lang xa hoi. hieu hien hanh duoc ((va danh) OR (va dinh)) hai cua su*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) ky lang xa hoi. hieu hien hanh duoc ((va danh) OR (va dinh)) hai cua su*".