Perhaps you should try some spelling variations:
bich ngoc » bich nga, dinh ngoc
hieu hien » bieu hien, dieu hien, chieu chien
hien bich » phien dich, chien dich, mien dich
hai cua » thai cua, dai cua, hoi cua
va danh » va dinh, va dan, va hanh
ngoc va » nuoc va, ngoc ha, goc va
so sach » bo sach, co sach, hoc sach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
so sanh » do sanh
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua

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) or (so sanh)) ty nang ma hoi. hieu hien bich ngoc va danh ((di cua) or (hai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ty nang ma hoi. hieu hien bich ngoc va danh ((di cua) OR (hai cua)) tu*.