Perhaps you should try some spelling variations:
hanh hang » thanh hang, hang hang, hanh han
hang hai » hoang hai, hang tai, thanh hai
cua viet » hoa viet, cua vat, cua dieu
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
hieu he » hieu ve, hiem he, hieu le
ca viet » va viet, co viet, hoa viet
sac ky » cac ky, sai ky
he am » he nam, ve am
thuc » thu

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 ky) OR (sac ky)) nang xa hoi. hieu he am thuc hanh hang hai ((cua viet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sac ky)) nang xa hoi. hieu he am thuc hanh hang hai ((cua viet) OR (ca viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sac ky)) nang xa hoi. hieu he am thuc hanh hang hai ((cua viet) or (ca viet))*".