Perhaps you should try some spelling variations:
tai khoa » da khoa, noi khoa
mai khoi » mai khoa, cac khoi, dai khoa
sach ly » sach y, sach lo, sach ty
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
te sach » toc sach
ly nang » ky nang, ly hang, ly vang
ve cau » ke cau, va cau, ve cac
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca 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 ly nang ((ma hoi) or (((mai khoi) or (tai khoa)))). hieu ve cau luc va hanh va cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ((ma hoi) OR (((mai khoi) OR (tai khoa)))). hieu ve cau luc va hanh va cua su.
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ((ma hoi) or (((mai khoi) or (tai khoa)))). hieu ve cau luc va hanh va cua su*.