Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » su sach, te sach, tu cach
tu nang » tru nang, tu nong, tu nano
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (tu sach)) tu nang x hoi. ((lieu va) or (hieu qua)) cam duc va hanh lai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) tu nang x hoi. ((lieu va) OR (hieu qua)) cam duc va hanh lai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) tu nang x hoi. ((lieu va) or (hieu qua)) cam duc va hanh lai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) tu nang x hoi. ((lieu va) or (hieu qua)) cam duc va hanh lai cua tu*.