Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
cac luc » cau luc, coc luc, cac nuoc
lai cam » lai nam, lai tam, lai chau
lai cau » lai chau, loi cau, loai cay
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
ly nang » ky nang, ly hang, ly vang
luc va » duc va, tuc va, loc va
ve cac » va cac, vien cac
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 (hoc sach)) ly nang x hoi. hieu ve cac luc va hanh ((lai cau) or (lai cam)) thi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (hoc sach)) ly nang x hoi. hieu ve cac luc va hanh ((lai cau) OR (lai cam)) thi.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (hoc sach)) ly nang x hoi. hieu ve cac luc va hanh ((lai cau) or (lai cam)) thi*.