Perhaps you should try some spelling variations:
tinh hai » tinh thai, tinh chat, trinh han
dang ky » dang y, dan ky, dong ky
sang ky » sang kyo, tang ky, bang ky
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va tinh » may tinh
su viet » so viet
san ky » van ky, dan ky, ban ky
ve nam » he nam, va nam, le nam
nam tu » nam thu, nam thuc
hai su » hai vu, lai su, hai so

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((san ky) or (((sang ky) OR (dang ky)))) nang xa hoi. hieu ve nam tu va tinh hai su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((san ky) OR (((sang ky) OR (dang ky)))) nang xa hoi. hieu ve nam tu va tinh hai su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((san ky) or (((sang ky) OR (dang ky)))) nang xa hoi. hieu ve nam tu va tinh hai su viet".
• Adding a wildcard symbol may retrieve word variants: te ((san ky) or (((sang ky) OR (dang ky)))) nang xa hoi. hieu ve nam tu va tinh hai su viet*.