Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
cau tren » cu tren, ca tren, cau treo
dau tren » dau tien, dat tren, dau tieng
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
tuc ca » tuc cac, tuc cua, tuc xa
ca dan » cac dan, ca dao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang cau hoi. hieu va cam tuc ca dan ca ((cau tren) OR (dau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang cau hoi. hieu va cam tuc ca dan ca ((cau tren) OR (dau tren))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang cau hoi. hieu va cam tuc ca dan ca ((cau tren) OR (dau tren))*.