Perhaps you should try some spelling variations:
thien van » thi van
van nang » van quang, van ban, van dong
nang duc » nang luc, nang doc, nang du
tinh gia » danh gia
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
va tinh » may tinh
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, voi nang
gia su » gia suc, giao su, gia sa

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 ((y nang) or (v nang)) xa hoi. thien van nang duc va tinh gia su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. thien van nang duc va tinh gia su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) xa hoi. thien van nang duc va tinh gia su triet*.