Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
hieu van » hieu va, thien van, hieu ve
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cau duc » cao duc, cau luc, chu duc
hanh va » hang va, hanh vi
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. ((hieu van) OR (lieu va)) cau duc va ((thanh van) or (hanh va)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. ((hieu van) OR (lieu va)) cau duc va ((thanh van) OR (hanh va)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. ((hieu van) OR (lieu va)) cau duc va ((thanh van) or (hanh va)) cua tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. ((hieu van) OR (lieu va)) cau duc va ((thanh van) or (hanh va)) cua tu*.