Perhaps you should try some spelling variations:
tham lang » nham nang, pham hang, thai bang
toc sach » hoc sach, doc sach, thuoc sach
cao truc » cau truc, vao truc, cao thuoc
hanh lai » hanh lam, hanh tai, thanh lap
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va

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 ((cam nang) or (tham lang)) xa hoi. ((hieu va) OR (hieu qua)) cao truc va hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((cam nang) OR (tham lang)) xa hoi. ((hieu va) OR (hieu qua)) cao truc va hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((cam nang) or (tham lang)) xa hoi. ((hieu va) OR (hieu qua)) cao truc va hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ((cam nang) or (tham lang)) xa hoi. ((hieu va) OR (hieu qua)) cao truc va hanh lai cua tre*.