Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
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 sac ky nang o hoi. hieu va cam xuc ((va hanh) or (va thanh)) vi ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang o hoi. hieu va cam xuc ((va hanh) OR (va thanh)) vi ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang o hoi. hieu va cam xuc ((va hanh) or (va thanh)) vi ((cua tre) or (cau tren))*.