Perhaps you should try some spelling variations:
cau tren » dau tren, ca tren, cau treo
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
cu tren » tu tren, dua tren
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau

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 ky nang cao hoi. hieu va cam tuc va dan ca ((cau tren) OR (cu tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang cao hoi. hieu va cam tuc va dan ca ((cau tren) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang cao hoi. hieu va cam tuc va dan ca ((cau tren) OR (cu tren))*.