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
danh vai » danh sai, danh va, doanh van
lang van » dang van, tang van, hoang van
so sach » so sanh, bo sach, co sach
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay
nang xa » nang x, nang ma, mang xa
cua tu » cua tuc, cua su, cua cu

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 ty ((nang xa) or (((lang xa) OR (lang van)))) hoi. hieu hien bach nuoc va danh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (((lang xa) OR (lang van)))) hoi. hieu hien bach nuoc va danh vai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang xa) or (((lang xa) OR (lang van)))) hoi. hieu hien bach nuoc va danh vai cua tu*".