Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
truc va » thuc va, thuc vat, trung va
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
tuc va » thuc va, tuc xa, duc va
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 (thu sach)) y lang xa hoi. hieu va cham ((tuc va) OR (truc va)) hang tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y lang xa hoi. hieu va cham ((tuc va) OR (truc va)) hang tai cuc te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) y lang xa hoi. hieu va cham ((tuc va) OR (truc va)) hang tai cuc te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y lang xa hoi. hieu va cham ((tuc va) OR (truc va)) hang tai cuc te*.