Perhaps you should try some spelling variations:
may nang » may nong, ky nang, cam nang
chat toc » chat hoc, chat doc, chat thom
toc gia » toc giay, tac gia, quoc gia
te sach » toc sach
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
v nang » va nang, vu nang, van nang
vi cau » va cau, di cau, viet cau
ve cau » ke cau, va cau, 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 ((may nang) or (v nang)) xa hoi. hieu ve chat toc gia thanh ((vi cau) OR (ve cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((may nang) OR (v nang)) xa hoi. hieu ve chat toc gia thanh ((vi cau) OR (ve cau)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((may nang) or (v nang)) xa hoi. hieu ve chat toc gia thanh ((vi cau) OR (ve cau)) tren".
• Adding a wildcard symbol may retrieve word variants: te sach ((may nang) or (v nang)) xa hoi. hieu ve chat toc gia thanh ((vi cau) OR (ve cau)) tren*.