Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
dua tren » dung tren
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
luc van » luoc van, duc van, luc va
luu van » cuu van, luan van, luu hanh
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
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: thuat sac ky nang xa hoi. hieu va cam ((luc van) OR (luu van)) hanh vi ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky nang xa hoi. hieu va cam ((luc van) OR (luu van)) hanh vi ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sac ky nang xa hoi. hieu va cam ((luc van) OR (luu van)) hanh vi ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thuat sac ky nang xa hoi. hieu va cam ((luc van) OR (luu van)) hanh vi ((dua tren) or (cua te))*.