Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hanh tuoc » hanh thuoc, hanh duoc, khanh quoc
hien hanh » dieu hanh
tuoc gia » quoc gia, toc gia, luoc gia
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
sac ky » cac ky, sai ky
te cua » le cua, de cua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) or (nang ma)) hoi. hieu hien hanh tuoc gia thanh ((te cua) OR (tue cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (nang ma)) hoi. hieu hien hanh tuoc gia thanh ((te cua) OR (tue cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) or (nang ma)) hoi. hieu hien hanh tuoc gia thanh ((te cua) OR (tue cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (nang ma)) hoi. hieu hien hanh tuoc gia thanh ((te cua) OR (tue cua)) tre*.