Perhaps you should try some spelling variations:
tay lang » tai lang, tay tang, tay quang
cham cuu » cap cuu, chat cua
tu sach » thu sach, su sach, te sach
hieu va » hieu qua
va dung » van dung, va duong, vat dung
y lang » o lang, _ lang, yen lang
cuu va » cuu van, cuu ve
cuc te » cua te, cuc thue, cuc tieu

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) or (tay lang)) xa hoi. ((hieu va) OR (lieu va)) cham cuu va dung tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y lang) OR (tay lang)) xa hoi. ((hieu va) OR (lieu va)) cham cuu va dung tai cuc te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y lang) or (tay lang)) xa hoi. ((hieu va) OR (lieu va)) cham cuu va dung tai cuc te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y lang) or (tay lang)) xa hoi. ((hieu va) OR (lieu va)) cham cuu va dung tai cuc te*.