Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham duc » pham duc, cham soc, pham duy
le tang » le quang, le trung, le thanh
va cham » va chat, va tham
ly tang » ly hang, ly vang, ky tang
va hanh » van hanh, va thanh, va danh
cu tren » dua tren
tu tren » tu truyen, tu tieng, tu trong
ma hoi » mai hoi, xa hoi, ma hoa

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 ((ly tang) OR (le tang)) ma hoi. lieu va cham duc va hanh vi ((cu tren) or (tu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ly tang) OR (le tang)) ma hoi. lieu va cham duc va hanh vi ((cu tren) OR (tu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ly tang) OR (le tang)) ma hoi. lieu va cham duc va hanh vi ((cu tren) or (tu tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ly tang) OR (le tang)) ma hoi. lieu va cham duc va hanh vi ((cu tren) or (tu tren))*.