Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
cham tuc » nham thuc, pham thuc, tham thuc
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
xa hanh » xa thanh, xa khanh, da hanh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
cu tren » tu tren, dua tren
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
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 y nang o hoi. hieu va cham tuc ((xa hanh) or (va hanh)) vi ((cau triet) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang o hoi. hieu va cham tuc ((xa hanh) OR (va hanh)) vi ((cau triet) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang o hoi. hieu va cham tuc ((xa hanh) or (va hanh)) vi ((cau triet) or (cu tren))*.