Perhaps you should try some spelling variations:
sach thuy » sach thu, sach thue, sach tham
thuy dong » thuy duong, huy dong, thuy dung
hoc viet » hoc hien
tu sach » thu sach, su sach, te sach
dong xa » dong xay, duong xa, dong ha
hieu va » lieu va, hieu qua
va cham » va chat, va tham
hoc vat » thuc vat
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 thuy dong xa hoi. hieu va cham ((hoc va) or (((hoc vat) or (hoc viet)))) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thuy dong xa hoi. hieu va cham ((hoc va) OR (((hoc vat) OR (hoc viet)))) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach thuy dong xa hoi. hieu va cham ((hoc va) or (((hoc vat) or (hoc viet)))) hanh vi cua tre*.