Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
nhan tap » nhan tai, nhan tao, han tap
va nhan » van nhan, ca nhan, va phan
thu sac » thu sach, thu san, thu xac
nang xa » nang x, lang xa, nang ma
cua tuc » cua duc, cua thuoc, luat tuc
sac ky » cac ky, sai ky
suc va » duc va, tuc va, luc va
ve cao » va cao, ve bao, ve cac
cua tu » cua su, cua cu, cua te

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang xa hoi. hieu ((ve cao) or (vien cac)) suc va nhan tap ((cua tu) OR (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang xa hoi. hieu ((ve cao) OR (vien cac)) suc va nhan tap ((cua tu) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky nang xa hoi. hieu ((ve cao) or (vien cac)) suc va nhan tap ((cua tu) OR (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang xa hoi. hieu ((ve cao) or (vien cac)) suc va nhan tap ((cua tu) OR (cua tuc))*.