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
thanh te » thanh ve, thanh de, thanh le
tuoc gia » quoc gia, toc gia, luoc gia
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
te cua » tue cua, le cua, de cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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