Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
cau tren » dau tren, ca tren, cau treo
tu sach » thu sach, su sach, te sach
dan can » dan chan, dan canh, dan ca
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
cao hoi » cau hoi, co hoi, cao hoc
cu tren » tu tren, dua tren
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 ((ve cham) or (vien cac)) tuc va dan can ((cau tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang cao hoi. hieu ((ve cham) OR (vien cac)) tuc va dan can ((cau tren) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang cao hoi. hieu ((ve cham) or (vien cac)) tuc va dan can ((cau tren) or (cu tren))*.