Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cau treo » cau theo, cau triet, cau trieu
hanh dau » hang dau, danh dau, han dau
te sach » toc sach
sach ky » sac ky, sach y, sach ty
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, duc va

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 ky nang xa hoi. hieu vu cham ((tuc va) or (tuc xa)) hanh dau ((cau treo) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu vu cham ((tuc va) OR (tuc xa)) hanh dau ((cau treo) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu vu cham ((tuc va) or (tuc xa)) hanh dau ((cau treo) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu vu cham ((tuc va) or (tuc xa)) hanh dau ((cau treo) OR (cau tren))*.