Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach nam » sach nay, sach tham, sach nang
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
long ha » dong ha, cong ha, dong hoa
hieu ve » hieu va, hieu van
cau luc » cau phuc
va hanh » van hanh, va thanh, va danh
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach nam ((lang ha) OR (long ha)) hoi. hieu ve ((cau luc) or (cau truc)) va hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach nam ((lang ha) OR (long ha)) hoi. hieu ve ((cau luc) OR (cau truc)) va hanh vai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach nam ((lang ha) OR (long ha)) hoi. hieu ve ((cau luc) or (cau truc)) va hanh vai cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach nam ((lang ha) OR (long ha)) hoi. hieu ve ((cau luc) or (cau truc)) va hanh vai cua tu*.