Perhaps you should try some spelling variations:
thien van » thi van
may nang » may nong, ky nang, cam nang
tinh gia » danh gia
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
ban luc » van luc, bao luc, nang luc
va tinh » may tinh
y nang » ky nang, ly nang, day nang
v nang » va nang, vu nang, van nang
luc va » duc va, tuc va, loc va
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 (may nang))) or (v nang)) xa hoi. thien van ban luc va tinh gia su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((((y nang) OR (may nang))) OR (v nang)) xa hoi. thien van ban luc va tinh gia su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((((y nang) OR (may nang))) or (v nang)) xa hoi. thien van ban luc va tinh gia su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((((y nang) OR (may nang))) or (v nang)) xa hoi. thien van ban luc va tinh gia su triet*.