Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
tinh vu » tinh va, tinh tu, tinh su
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
vu tac » va tac, ve tac, vu tai
x hoi » o hoi, x ho, 5 hoi
tuyen* » truyen*, quyen*

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((x hoi) or (xa hoi)). hieu va cam ((xuc va) OR (luc va)) tinh vu tac tuyen~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((x hoi) OR (xa hoi)). hieu va cam ((xuc va) OR (luc va)) tinh vu tac tuyen*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((x hoi) or (xa hoi)). hieu va cam ((xuc va) OR (luc va)) tinh vu tac tuyen*".