Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
van hanh » van thanh, ban hanh, van anh
nang tay » nang tai, nang tao, bang tay
hieu van » hieu va, thien van, lieu va
ve triet » su triet
tay hoi » tay ho, tao hoi, tay thai
cam tuc » cam tu, nam thuc, dam thuc
su sai » su tai, su hai, su dai
sai ky » sac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky nang tay hoi. hieu van ((cam tuc) or (cam xuc)) van hanh vi ((ve triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang tay hoi. hieu van ((cam tuc) OR (cam xuc)) van hanh vi ((ve triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky nang tay hoi. hieu van ((cam tuc) or (cam xuc)) van hanh vi ((ve triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: su sai ky nang tay hoi. hieu van ((cam tuc) or (cam xuc)) van hanh vi ((ve triet) OR (va trien))*.