Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dua tren » dung tren
tai hoi » tai khoi, tai hai, tai hoe
dai hoi » dai hoc, dai hai, dai moi
sach ky » sac ky, sach y, sach ty
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
cu tren » tu tren
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao

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 ky nang ((tai hoi) or (dai hoi)). lieu va cam luc va hanh vi ((cu tren) OR (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((tai hoi) OR (dai hoi)). lieu va cam luc va hanh vi ((cu tren) OR (dua tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((tai hoi) or (dai hoi)). lieu va cam luc va hanh vi ((cu tren) OR (dua tren))*".