Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
ty nang » ty xang, ty hang, ly nang
mai hoi » mai khoi, dai hoi, lai hoi
luc va » duc va, tuc va, loc va
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
cua te » cua tu

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 ((ty nang) or (ky nang)) mai hoi. hieu ((ve cam) OR (ve cac)) luc va thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ky nang)) mai hoi. hieu ((ve cam) OR (ve cac)) luc va thanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) or (ky nang)) mai hoi. hieu ((ve cam) OR (ve cac)) luc va thanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) or (ky nang)) mai hoi. hieu ((ve cam) OR (ve cac)) luc va thanh dai cua te*.