Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
phan lap » phan dau
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
van bac » van ban, van bao, van hac
lap cua » lai cua, tap cua, lam cua
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (hoc sach)) ky nang xa hoi. thi van bac ((xuc va) or (duc va)) phan lap cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang xa hoi. thi van bac ((xuc va) OR (duc va)) phan lap cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ky nang xa hoi. thi van bac ((xuc va) or (duc va)) phan lap cua viet".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (hoc sach)) ky nang xa hoi. thi van bac ((xuc va) or (duc va)) phan lap cua viet*.