Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
ban hanh » ban hang
cong ban » cong bang, cong san, cong tan
cac cong » cua cong
hieu ve » hieu va, hieu van
hai cua » thai cua, dai cua, hoi cua
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
sac ky » cac ky
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: te ((((sach ky) OR (sac ky))) or (sai ky)) nang xa hoi. hieu ve cac cong ban hanh hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((((sach ky) OR (sac ky))) OR (sai ky)) nang xa hoi. hieu ve cac cong ban hanh hai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((((sach ky) OR (sac ky))) or (sai ky)) nang xa hoi. hieu ve cac cong ban hanh hai cua tu*".