Perhaps you should try some spelling variations:
trinh lap » trinh luat, trinh luan, trinh phap
viet bac » viet bao, vien bach, viet sach
viet cac » vien cac, viet ca, viet cau
dinh tai » dinh toai, dinh tri, dinh thi
nang xa » nang x, lang xa, nang ma
vu san » va san, vu ban
loc va » hoc va, luc va
san ky » sang ky, van ky, dan ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu san ky nang xa hoi. sieu ((viet cac) OR (viet bac)) loc va ((trinh lap) or (dinh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ky nang xa hoi. sieu ((viet cac) OR (viet bac)) loc va ((trinh lap) OR (dinh tai)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu san ky nang xa hoi. sieu ((viet cac) OR (viet bac)) loc va ((trinh lap) or (dinh tai)) cua te*".