Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, gian cac
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
nuoc van » nuoc va, nuoc san, luoc van
vien da » vien dai, hien dai
doi cua » dai cua, hoi cua
te sach » toc sach
ly vang » ly hang, ly van, ly quang
ly lang » ly hang, le lang, ly lanh
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 lang) OR (ly vang)) xa hoi. hieu ((vien cac) or (vien da)) nuoc van hanh doi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly lang) OR (ly vang)) xa hoi. hieu ((vien cac) OR (vien da)) nuoc van hanh doi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ly lang) OR (ly vang)) xa hoi. hieu ((vien cac) or (vien da)) nuoc van hanh doi cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ((ly lang) OR (ly vang)) xa hoi. hieu ((vien cac) or (vien da)) nuoc van hanh doi cua tu*.