Perhaps you should try some spelling variations:
te sach » toc sach
va nang » van nang, da nang, cam nang
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, lai cua
hoi cua » hoi chuc
y nang » ky nang, ly nang, v nang
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: te sach ((y nang) or (va nang)) cao hoi. hieu ve cam duc va hanh ((hai cua) OR (hoi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (va nang)) cao hoi. hieu ve cam duc va hanh ((hai cua) OR (hoi cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (va nang)) cao hoi. hieu ve cam duc va hanh ((hai cua) OR (hoi cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (va nang)) cao hoi. hieu ve cam duc va hanh ((hai cua) OR (hoi cua)) te*.