Perhaps you should try some spelling variations:
thong tuong » thong thuong, thong thong, thong duong
hieu manh » chieu xanh, hieu nganh, dieu hanh
manh toan » thanh toan, anh tuan, tinh toan
hoc hieu » hoc thieu, hoc hien, doc hieu
tinh cua » trinh cua, tinh chat, tranh cua
sinh cua » manh cua, dinh cuu, sinh va
dan than » dan chan, ban than, van than

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 manh - hanh ((tinh cua) OR (sinh cua)) thong tuong ((manh toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((tinh cua) OR (sinh cua)) thong tuong ((manh toan) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh ((tinh cua) OR (sinh cua)) thong tuong ((manh toan) or (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((tinh cua) OR (sinh cua)) thong tuong ((manh toan) or (dan than)) cau*.