Perhaps you should try some spelling variations:
nuoc giai » nuoc ngoai, quoc gia, nuoc thai
truc van » truc va, thuc van, truc ban
giai ky » giai ke, giang ky
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
hanh de » hanh ve, hanh kem
cu tren » tu tren, dua tren
ma hoi » mai hoi, xa hoi, ma hoa
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc giai ky nang ma hoi. hieu ve cau truc van ((hanh de) or (hanh vi)) cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc giai ky nang ma hoi. hieu ve cau truc van ((hanh de) OR (hanh vi)) cu tren.
• Adding a wildcard symbol may retrieve word variants: nuoc giai ky nang ma hoi. hieu ve cau truc van ((hanh de) or (hanh vi)) cu tren*.