Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
van hanh » van thanh, ban hanh, van anh
dau treo » cau treo, dau theo, dau tien
dau tren » dau tien, dat tren, dau tieng
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, xuc ban
hanh va » hang va, hanh vi
ve cam » ve cham, ve cac, va cam

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

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