Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sach ty)) nang o hoi. hieu ve cam xuc va hanh vi ((cua te) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang o hoi. hieu ve cam xuc va hanh vi ((cua te) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach ty)) nang o hoi. hieu ve cam xuc va hanh vi ((cua te) or (cau tren))*".