Perhaps you should try some spelling variations:
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
hanh di » hanh vi, hanh de, hang di
ma hoi » mai hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
di cua » dai cua, doi cua, de cua
cua su » qua su

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 ty nang ((ma hoi) or (xa hoi)). hieu ve cam ((xuc van) OR (duc van)) hanh di cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((ma hoi) OR (xa hoi)). hieu ve cam ((xuc van) OR (duc van)) hanh di cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((ma hoi) or (xa hoi)). hieu ve cam ((xuc van) OR (duc van)) hanh di cua su".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((ma hoi) or (xa hoi)). hieu ve cam ((xuc van) OR (duc van)) hanh di cua su*.