Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
cham duc » pham duc, cham soc, pham duy
thanh va » hanh va, thanh ha, thanh ve
tu sach » thu sach, su sach, te sach
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
ly nang » ky nang, ly hang, ly vang
chua te » cua te, chua tu, chua xe
y nang » ky nang, v nang, may nang

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