Perhaps you should try some spelling variations:
thanh hoa » thanh pho
su triet » su viet, su tien, ve triet
cham dua » chay dua, cham giua, pham duc
thanh ha » thanh hai, nhanh ha, thanh phan
dua ban » dia ban, cua ban, qua ban
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky tang » ky nang, ky dang, kho tang
ve cham » va cham, ve chat, vu cham

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky tang ((hoa hoi) or (xa hoi)). hieu ve cham dua ban ((thanh ha) OR (thanh hoa)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky tang ((hoa hoi) OR (xa hoi)). hieu ve cham dua ban ((thanh ha) OR (thanh hoa)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky tang ((hoa hoi) or (xa hoi)). hieu ve cham dua ban ((thanh ha) OR (thanh hoa)) su triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky tang ((hoa hoi) or (xa hoi)). hieu ve cham dua ban ((thanh ha) OR (thanh hoa)) su triet*.