Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cua nhung » va nhung
chong van » thong van, phong van, chong va
hoc hieu » hoc hien, doc hieu, hoc dieu
sinh cua » manh cua, dinh cuu, sinh va
hong van » hoang van, thong van, phong van
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) or (hoc thieu)) manh - hanh sinh cua nhung ((chong van) OR (hong van)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) manh - hanh sinh cua nhung ((chong van) OR (hong van)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) or (hoc thieu)) manh - hanh sinh cua nhung ((chong van) OR (hong van)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc thieu)) manh - hanh sinh cua nhung ((chong van) OR (hong van)) toan cau*.