Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
chat tuc » chat xuc, luat tuc, chat huu
thu sach » tu sach, thuat sach, thuoc sach
thi nang » thi cong, ki nang, thi hanh
hieu van » hieu va, thien van, lieu va
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
lai cua » hai cua, lai chau, thai cua
tuc va » thuc va, truc va, tuc xa

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

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