Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
trong dan » trong dang, trong san, trong ban
trong tan » trong quan, trong cac, trong ca
ho chieu » theo chieu, doi chieu, mot chieu
tang ung » tong ung, dang ung, tang cuong
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) xanh - hanh tang ung dung ((trong dan) OR (trong tan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - hanh tang ung dung ((trong dan) OR (trong tan)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) xanh - hanh tang ung dung ((trong dan) OR (trong tan)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - hanh tang ung dung ((trong dan) OR (trong tan)) toan ban*.