Perhaps you should try some spelling variations:
chon loc » cho hoc
dung sai » dung tai, dung va, dung dat
dung hai » dung tai, dung ha, dung nhan
cham loc » cham soc, cham o, hau loc
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
cua tu » cua tuc, cua su, cua cu

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 lang xa hoi. hieu ve ((cham loc) or (chon loc)) vat ((dung hai) OR (dung sai)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu ve ((cham loc) OR (chon loc)) vat ((dung hai) OR (dung sai)) cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu ve ((cham loc) or (chon loc)) vat ((dung hai) OR (dung sai)) cua tu*".