Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
cau tren » dau tren, ca tren, cau treo
cham luc » cham soc, nhan luc, cham cuu
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
cu tren » tu tren, dua tren
tu sach » su sach, te sach, tu cach
nang o » nang co, nang ho, nang ro
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
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: ((thu sach) OR (tu sach)) y nang o hoi. lieu va cham luc va hanh vi ((cau tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) y nang o hoi. lieu va cham luc va hanh vi ((cau tren) OR (cu tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) y nang o hoi. lieu va cham luc va hanh vi ((cau tren) or (cu tren))*".