Perhaps you should try some spelling variations:
trang tuan » tran tuan, trung tuan, trong tuan
hoc thieu » toc thieu, hoc hien
trang qua » trong qua, trong quan, trung quan
dung cong » dung trong
hoc hieu » hoc hien, doc hieu, hoc dieu
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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 ((trang qua) OR (trang tuan)) dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) manh - hanh ((trang qua) OR (trang tuan)) dung cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) or (hoc thieu)) manh - hanh ((trang qua) OR (trang tuan)) dung cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc thieu)) manh - hanh ((trang qua) OR (trang tuan)) dung cong tan toan cau*.