Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
nam truc » nam truoc, nam thuc, nam trung
cam truc » cau truc, lam truoc, nam truoc
su sach » so sach, vu sach
tu sach » thu sach, te sach, tu cach
nang o » nang co, nang ho, nang ro
vai su » va su, van su, lai su
o lai » o lao

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 (su sach)) ky nang o lai. lieu va ((cam truc) or (nam truc)) va thanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang o lai. lieu va ((cam truc) OR (nam truc)) va thanh vai su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang o lai. lieu va ((cam truc) or (nam truc)) va thanh vai su triet*".