Perhaps you should try some spelling variations:
tham lang » nham nang, pham hang, thai bang
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
va xanh » va hanh, va anh, va banh
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
cuu tre » cua tre, cau tren, cau treo
cac tu » cac thu, cach tu, cac du
di cuu » di cau, di cua, dinh cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (hoc sach)) tham lang xa hoi. hieu va cac tu ((va xanh) or (va danh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) tham lang xa hoi. hieu va cac tu ((va xanh) OR (va danh)) di cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) tham lang xa hoi. hieu va cac tu ((va xanh) or (va danh)) di cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (hoc sach)) tham lang xa hoi. hieu va cac tu ((va xanh) or (va danh)) di cuu tre*.