Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
hoc thieu » toc thieu, hoc hien
hanh tinh » hanh trinh, thanh tinh, canh tinh
hang cong » dang cong, hang nong, bang cong
cong tinh » cong trinh, cong vinh, long tinh
toan cao » toan ban, toan tap
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - ((hanh tinh) or (nhanh tinh)) va hang cong tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((hanh tinh) OR (nhanh tinh)) va hang cong tinh toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((hanh tinh) or (nhanh tinh)) va hang cong tinh toan cao*.