Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu su » hieu sau, tieu su, hieu so
nha luc » nhan luc, nha nuoc, nham muc
luc van » luoc van, luu van, duc van
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang

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

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