Perhaps you should try some spelling variations:
te sach » toc sach
va hanh » van hanh, va thanh, va danh
lang ha » long ha
va tinh » may tinh
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao
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 x) or (lang ha)) hoi. hieu va cam xuc ((va hanh) or (va tinh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang x) OR (lang ha)) hoi. hieu va cam xuc ((va hanh) OR (va tinh)) vi cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang x) or (lang ha)) hoi. hieu va cam xuc ((va hanh) or (va tinh)) vi cua te*.