Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
su triet » su viet, su tien, ve triet
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
dang xay » dang van, van xay
ve cham » va cham, ve chat, vu cham
tu sach » su sach, te sach, tu cach
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
luc va » duc va, tuc va, loc va
vai su » va su, van su, lai su
ve cam » ve cac, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) ky dang xay hoi. hieu ((ve cam) or (ve cham)) luc va thanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky dang xay hoi. hieu ((ve cam) OR (ve cham)) luc va thanh vai su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky dang xay hoi. hieu ((ve cam) or (ve cham)) luc va thanh vai su triet*.