Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hieu thien » hieu hien, chieu chien, dieu khien
hach nuoc » sach nuoc, hoc nuoc, cac nuoc
xanh tai » hanh tai, anh tai, vanh tai
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
va xanh » va danh, va hanh, va anh
sac ky » cac ky, sai ky
cua tu » cua tuc, cua su, cua te
cua cu » cua chu, cua cau, cua 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 ky) OR (sac ky)) nang xa hoi. hieu thien hach nuoc va xanh tai ((cua tu) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sac ky)) nang xa hoi. hieu thien hach nuoc va xanh tai ((cua tu) OR (cua cu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sac ky)) nang xa hoi. hieu thien hach nuoc va xanh tai ((cua tu) or (cua cu))*".