Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dua tren » dung tren
va cham » va chat
sang ma » tang ma, nang ma, sang tao
va hanh » van hanh, va thanh, va danh
cu tren » tu tren
va tham » van tham, va thanh, va thuat
ma hoi » mai hoi, xa hoi, ma hoa
y sang » _ sang, duy sang
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y sang ma hoi. lieu ((va cham) or (va tham)) luc va hanh vi ((cu tren) OR (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y sang ma hoi. lieu ((va cham) OR (va tham)) luc va hanh vi ((cu tren) OR (dua tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y sang ma hoi. lieu ((va cham) or (va tham)) luc va hanh vi ((cu tren) OR (dua tren))".
• Adding a wildcard symbol may retrieve word variants: thuat sach y sang ma hoi. lieu ((va cham) or (va tham)) luc va hanh vi ((cu tren) OR (dua tren))*.