Perhaps you should try some spelling variations:
vat dung » van dung, viet dung, mat duong
tu sach » thu sach, su sach, tu cach
te sach » toc sach
lang xa » lang ha, dang xay, lang van
qua cam » qua cham, qua cac, qua ca
cam duc » cam xuc, cao duc, pham duc
va dung » van dung, va duong, va ung
y lang » o lang, _ lang, tay lang
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) OR (te sach)) y lang xa hoi. hieu qua cam duc ((va dung) or (vat dung)) tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y lang xa hoi. hieu qua cam duc ((va dung) OR (vat dung)) tai cuc te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) y lang xa hoi. hieu qua cam duc ((va dung) or (vat dung)) tai cuc te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) y lang xa hoi. hieu qua cam duc ((va dung) or (vat dung)) tai cuc te*.