Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
cac nuoc » cap nuoc, hoc nuoc, cua nuoc
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
te sach » toc sach
sach ly » sach y, sach lo, sach ty
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
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 nang ma hoi. hieu hien ((cac nuoc) OR (dat nuoc)) ((van hanh) or (ban hanh)) dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ma hoi. hieu hien ((cac nuoc) OR (dat nuoc)) ((van hanh) OR (ban hanh)) dai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang ma hoi. hieu hien ((cac nuoc) OR (dat nuoc)) ((van hanh) or (ban hanh)) dai cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ma hoi. hieu hien ((cac nuoc) OR (dat nuoc)) ((van hanh) or (ban hanh)) dai cua tu*.