Perhaps you should try some spelling variations:
thien tinh » khien tinh, thien minh, tien tinh
hoc thien » hoc hien, hoc thieu, hoc thiet
tung cap » trung cap, thong cap, trong cap
cung cap » trung cap
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien tinh - thanh ((tung cap) or (cung cap)) trong cong san phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien tinh - thanh ((tung cap) OR (cung cap)) trong cong san phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thien tinh - thanh ((tung cap) or (cung cap)) trong cong san phan cau*.