Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
van hanh » van thanh, ban hanh, van anh
cau theo » cau tao
dau tren » dau tien, dat tren, dau tieng
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tuc van » thuc van, truc van, tuc va
hanh ve » hanh vi, hanh va, hanh kem
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: te sach ty nang x hoi. hieu va cham tuc van hanh ve ((((cau theo) or (cau thi))) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. hieu va cham tuc van hanh ve ((((cau theo) OR (cau thi))) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. hieu va cham tuc van hanh ve ((((cau theo) or (cau thi))) or (dau tren))*.