Perhaps you should try some spelling variations:
te sach » toc sach
va danh » va dinh, va dan, va hanh
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
ty nang » ky nang, ty hang, ly nang
va huu » vu huu
va chu » va che, va cau, va chi
ve cao » va cao, ve bao, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ty nang) or (ty xang)) xa hoi. hieu ve cao hoc va danh ((va huu) or (va chu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty xang)) xa hoi. hieu ve cao hoc va danh ((va huu) OR (va chu)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) or (ty xang)) xa hoi. hieu ve cao hoc va danh ((va huu) or (va chu)) tre*.