Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
ban duoc » tan duoc, van duoc, ban thuoc
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
duoc va » nuoc va, duc va, duoc ma
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
ty nang » ty xang, ty hang, ly nang
ma hoi » mai hoi, xa hoi, ma hoa
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) OR (ky nang)) ma hoi. ((hieu hien) or (hieu ve)) ban duoc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ky nang)) ma hoi. ((hieu hien) OR (hieu ve)) ban duoc va hanh vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ky nang)) ma hoi. ((hieu hien) or (hieu ve)) ban duoc va hanh vi cuu tre*".