Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dua tren » dung tren
nang tai » hang tai, tang tai, sang tai
tai hoi » tai khoi, dai hoi, tai hai
cam luc » cam xuc
sach ky » sac ky, sach y, sach ty
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
cu tren » tu tren

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. lieu va ((cam luc) or (cau 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. lieu va ((cam luc) OR (cau 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. lieu va ((cam luc) or (cau luc)) va hanh vi ((cu tren) OR (dua tren))*".