Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien hach » thien thanh, hien hanh
hach nuoc » sach nuoc, hoc nuoc, cac nuoc
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
nang xa » lang xa, nang ma, mang xa
dinh di » dinh du, dinh vi, danh di
va dinh » van dinh, va kinh, va tinh
di cua » dai cua, doi cua, de cua
cua tu » cua tuc, cua su, cua cu

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 (bo sach)) ky ((nang xa) or (nang x)) hoi. hieu thien hach nuoc va dinh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ky ((nang xa) OR (nang x)) hoi. hieu thien hach nuoc va dinh di cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (bo sach)) ky ((nang xa) or (nang x)) hoi. hieu thien hach nuoc va dinh di cua tu*".