Perhaps you should try some spelling variations:
khang kho » khong kho, khong khoa, hang khoa
lang hai » lang chai, lang thai, lang ha
khang ky » hong ky, dang ky, kieng ky
te sach » toc sach
duc van » duc va, duc tan, duc manh
xuc van » luc van, vuc van, xuc ban
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
hai hoi » dai hoi, hai moi, hai hai
su viet » so viet
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang

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 o lang hai hoi. hieu ve cham ((xuc van) or (duc van)) ((khang ky) or (khang kho)) su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o lang hai hoi. hieu ve cham ((xuc van) OR (duc van)) ((khang ky) OR (khang kho)) su viet.
• Adding a wildcard symbol may retrieve word variants: te sach o lang hai hoi. hieu ve cham ((xuc van) or (duc van)) ((khang ky) or (khang kho)) su viet*.