Perhaps you should try some spelling variations:
nam truoc » nam thuoc, lam truoc, nam truc
hieu van » hieu va, thien van, lieu va
cam truc » cau truc, nam truc, lam truoc
ve triet » va trien, su triet
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
te sai » te tai, te bai, te lai
sai ky » sac ky
va dao » ca dao
dao ke » do ke, dao ve, dao le
ke ve » ke va, ke he, de ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky dang xa hoi. hieu van ((cam truc) or (nam truoc)) va dao ke ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky dang xa hoi. hieu van ((cam truc) OR (nam truoc)) va dao ke ve triet.
• Adding a wildcard symbol may retrieve word variants: te sai ky dang xa hoi. hieu van ((cam truc) or (nam truoc)) va dao ke ve triet*.