Perhaps you should try some spelling variations:
thien van » thi van
su triet » su viet, su tien, ve triet
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
van dau » van dao, phan dau
su sach » vu sach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
dau tuc » dau tu, dao tuc, cau truc
y nang » ky nang, ly nang, v nang
hai su » hai vu, lai su, hai so

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) y nang xa hoi. thien van dau tuc ((va danh) OR (va dinh)) hai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang xa hoi. thien van dau tuc ((va danh) OR (va dinh)) hai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) y nang xa hoi. thien van dau tuc ((va danh) OR (va dinh)) hai su triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y nang xa hoi. thien van dau tuc ((va danh) OR (va dinh)) hai su triet*.