Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
sach ky » sach y, sach ty, sach kem
doi cua » dai cua, hoi cua
va hanh » van hanh, va danh, ban hanh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
sac ky » cac ky, sai ky
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: vu ((sach ky) OR (sac ky)) nang xa hoi. hieu va cam tuc ((va hanh) or (va thanh)) doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sac ky)) nang xa hoi. hieu va cam tuc ((va hanh) OR (va thanh)) doi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ky) OR (sac ky)) nang xa hoi. hieu va cam tuc ((va hanh) or (va thanh)) doi cua te".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) OR (sac ky)) nang xa hoi. hieu va cam tuc ((va hanh) or (va thanh)) doi cua te*.