Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
hanh va » hang va, hanh vi
tuc va » thuc va, truc va, tuc xa
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
luc va » duc va, loc va
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: tu cai ky nang x hoi. hieu ve cham ((luc va) or (tuc va)) hanh va ((cua vat) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky nang x hoi. hieu ve cham ((luc va) OR (tuc va)) hanh va ((cua vat) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: tu cai ky nang x hoi. hieu ve cham ((luc va) or (tuc va)) hanh va ((cua vat) or (cau tren))*.