Perhaps you should try some spelling variations:
chua viet » chuan viet, cua viet, chu viet
ban thanh » ban hanh, ban hang
thanh ha » thanh hoa, thanh hai, nhanh ha
pham duy » pham duc
ha chua » cha chua, ca chua, ho chua
tu sach » thu sach, su sach, te sach
hieu su » hieu sau, tieu su, hieu so
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky lang) or (ky dang)) ha hoi. hieu su ((phan tu) or (pham duy)) ban thanh ha chua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) ha hoi. hieu su ((phan tu) OR (pham duy)) ban thanh ha chua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky dang)) ha hoi. hieu su ((phan tu) or (pham duy)) ban thanh ha chua viet*.