Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thiet » hoc thieu, hoc thuyet, toc thieu
trung kha » trung khoa, trung ha, truong khoa
nang dong » nang song, lang dong, nang luong
kha nang » phap nang, ky nang, ki nang
dong van » duong van, dang van, dong von
ban cao » bao cao, ban can, ban co

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (hoc thiet)) anh - thanh trung kha nang dong van ban cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (hoc thiet)) anh - thanh trung kha nang dong van ban cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (hoc thiet)) anh - thanh trung kha nang dong van ban cao*.