Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
hang tai » hang va
vu sach » vu bach, su sach, vu khach
va cham » va chat, va tham
duc tre » duoc tren, duc tien
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
va cam » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang mai hoi. hieu ((va cam) or (va cham)) duc va ((hang tai) OR (dung tai)) duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang mai hoi. hieu ((va cam) OR (va cham)) duc va ((hang tai) OR (dung tai)) duc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang mai hoi. hieu ((va cam) or (va cham)) duc va ((hang tai) OR (dung tai)) duc tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang mai hoi. hieu ((va cam) or (va cham)) duc va ((hang tai) OR (dung tai)) duc tre*.