Perhaps you should try some spelling variations:
han thai » han tai, ban thai, van thai
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
thai va » thai van
xuc va » tuc va, luc va, xac va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((nang xa) or (nang x)) hoi. hieu ve chat ((xuc va) or (duc va)) han thai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang x)) hoi. hieu ve chat ((xuc va) OR (duc va)) han thai va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (nang x)) hoi. hieu ve chat ((xuc va) or (duc va)) han thai va thiet*.