Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
te sach » toc sach
ve cham » va cham, ve chat, vu cham
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
ve cam » ve cac, va cam, ve cai
ma hoi » xa hoi, ma hoa, me hoi
cua te » cua tu

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