Perhaps you should try some spelling variations:
thu nang » thu hang, thu bang, tho nang
thi nang » thi cong, ki nang, thi hanh
so sach » so sanh, bo sach, co sach
hieu vi » hieu voi, hieu va, hieu ve
va hanh » van hanh, va thanh, va danh
vai cua » hai cua, lai cua, bai cua
ma hoi » mai hoi, xa hoi, ma hoa
pham » phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((thu nang) or (thi nang)) ma hoi. hieu vi pham duc va hanh ((vai cua) OR (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((thu nang) OR (thi nang)) ma hoi. hieu vi pham duc va hanh ((vai cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((thu nang) or (thi nang)) ma hoi. hieu vi pham duc va hanh ((vai cua) OR (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: so sach ((thu nang) or (thi nang)) ma hoi. hieu vi pham duc va hanh ((vai cua) OR (dai cua)) te*.