Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
hanh manh » hanh mang, lanh manh, hoang manh
cua thong » cua thuong, cua khong, cua tong
thong cap » thong cac, trung cap, thong cua
manh cua » doanh cua, ban cua
cap toan » tap toan, lap toan, phap 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 thien hach - hanh manh cua thong thong cap toan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh manh cua thong thong cap toan cau*.