Perhaps you should try some spelling variations:
thanh hoa » thanh pho
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ky » sach y, sach ty, sach kem
cuu ban » cuu van, cua ban, cuu nang
cuu san » cuu van, cua san, cuu nang
sac ky » cac ky, sai ky
hoa va » hoa van, hoa xa, hoa vo

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) or (sac ky)) nang xa hoi. hieu va cham ((cuu ban) OR (cuu san)) thanh hoa va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu va cham ((cuu ban) OR (cuu san)) thanh hoa va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang xa hoi. hieu va cham ((cuu ban) OR (cuu san)) thanh hoa va triet*".