Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
sach ky » sac ky, sach ty, sach kem
vi cua » vai cua, di cua
va dan » ca dan, va dao, va dau
va cam » va cham, va cac, va cao
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach y)) nang xa hoi. hieu va cam xuc ((va hanh) or (va dan)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang xa hoi. hieu va cam xuc ((va hanh) OR (va dan)) vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang xa hoi. hieu va cam xuc ((va hanh) or (va dan)) vi cua tu*.