Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue nang » thien nang, thuat nang, thi nang
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
cam duc » cao duc, pham duc, nam duoc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thue nang xa hoi. hieu ve ((cam duc) OR (cam xuc)) va danh ((vai cua) or (lai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thue nang xa hoi. hieu ve ((cam duc) OR (cam xuc)) va danh ((vai cua) OR (lai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thue nang xa hoi. hieu ve ((cam duc) OR (cam xuc)) va danh ((vai cua) or (lai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach thue nang xa hoi. hieu ve ((cam duc) OR (cam xuc)) va danh ((vai cua) or (lai cua)) triet*.