Perhaps you should try some spelling variations:
sach tri » sach tai, sach tren, sach truc
tri nang » thi nang, tra nang, tri bang
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
va quan » van quan, tac quan, hai quan
va hanh » va thanh, va danh, ban hanh
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va qua » va quy, va quang

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 tri nang xa hoi. hieu va cac xuc ((va hanh) or (van hanh)) ((va qua) OR (va quan)) su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tri nang xa hoi. hieu va cac xuc ((va hanh) OR (van hanh)) ((va qua) OR (va quan)) su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tri nang xa hoi. hieu va cac xuc ((va hanh) or (van hanh)) ((va qua) OR (va quan)) su".
• Adding a wildcard symbol may retrieve word variants: te sach tri nang xa hoi. hieu va cac xuc ((va hanh) or (van hanh)) ((va qua) OR (va quan)) su*.