Perhaps you should try some spelling variations:
cau tren » dau tren, ca tren, cau treo
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
tu sach » thu sach, su sach, te sach
danh va » doanh va, hanh va, anh va
cu tren » tu tren, dua tren
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
xuc va » tuc va, luc va, xac va
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 tham ((xuc va) or (duc va)) danh va ((cau tren) OR (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu van tham ((xuc va) OR (duc va)) danh va ((cau tren) OR (cu tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu van tham ((xuc va) or (duc va)) danh va ((cau tren) OR (cu tren))*".