Perhaps you should try some spelling variations:
hien bich » phien dich, chien dich, mien dich
bich ngoc » bich nga, dinh ngoc
hieu hien » bieu hien, dieu hien, chieu chien
hoc sach » hoc sinh, hoc cac, hoc anh
va danh » va dinh, va hanh, dia danh
co sach » bo sach, cuon sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua
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: ((co sach) OR (hoc sach)) ky lang xa hoi. hieu hien bich ngoc ((va danh) or (va dan)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (hoc sach)) ky lang xa hoi. hieu hien bich ngoc ((va danh) OR (va dan)) vi cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) OR (hoc sach)) ky lang xa hoi. hieu hien bich ngoc ((va danh) or (va dan)) vi cua tu*".