Perhaps you should try some spelling variations:
hien bach » vien bach, thien hach, hien hanh
bach nuoc » bach tuoc, sach nuoc, bich ngoc
hieu hien » bieu hien, dieu hien, chieu chien
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
dan vi » doan vi, don vi, gan vi
dan va » doan va, dan ca, ban va
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: co ((sach ty) OR (sac ky)) nang xa hoi. hieu hien bach nuoc va ((dan vi) OR (dan va)) cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co ((sach ty) or (sac ky)) nang xa hoi. hieu hien bach nuoc va ((dan vi) OR (dan va)) cua tu~".
• Adding a wildcard symbol may retrieve word variants: co ((sach ty) or (sac ky)) nang xa hoi. hieu hien bach nuoc va ((dan vi) OR (dan va)) cua tu*.