Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nuoc ban » nuoc san, quoc ban, buoc ban
ban hanh » ban hang
hanh dai » hanh tai, hanh dao, vanh dai
sach ly » sach y, sach lo, sach hay
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
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 ly) or (sach ty)) nang ma hoi. hieu hien cac nuoc ban hanh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ly) OR (sach ty)) nang ma hoi. hieu hien cac nuoc ban hanh dai cua tu.
• Adding a wildcard symbol may retrieve word variants: te ((sach ly) or (sach ty)) nang ma hoi. hieu hien cac nuoc ban hanh dai cua tu*.