Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
thu sach » thuat sach, thuoc sach, thu hoach
dung doi » huong doi, dung tai, dung co
tu sach » su sach, te sach, tu cach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
xa dung » xay dung, xa dong, va dung
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

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) or (thu sach)) ky nang x ho. hieu vu cham tuc xa dung doi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x ho. hieu vu cham tuc xa dung doi ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang x ho. hieu vu cham tuc xa dung doi ((cua tre) OR (cuu tre))*".