Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
thu xac » thau xay
hieu va » lieu va, hieu qua
cac lop » cac hop, cac loai
va danh » va dinh, va dan, va hanh
cua tre » cuu tre, cua triet, dua tren
xac ky » cac ky, sac ky, bac ky
nang o » nang co, nang ho, nang ro
lop va » lap va, hop va, nop va
cua te » cua tu
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu xac ky nang o hoc. hieu va cac lop va danh vai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu xac ky nang o hoc. hieu va cac lop va danh vai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: thu xac ky nang o hoc. hieu va cac lop va danh vai ((cua tre) or (cua te))*.