Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
tu sach » thu sach, su sach, te sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
dao duc » giao duc, tao duoc
va hang » van hang, va nang, va lang
tai cua » thai cua, tai cuc, tri cua
cua te » cua tu

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 y ((nang xa) or (lang xa)) hoi. hieu ve ((pham duc) or (dao duc)) va hang tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (lang xa)) hoi. hieu ve ((pham duc) OR (dao duc)) va hang tai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (lang xa)) hoi. hieu ve ((pham duc) or (dao duc)) va hang tai cua te*.