Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
mot chieu » doi chieu, ho chieu
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
dung cong » dung trong
thuat cam » thuat dam, thuat chan, thuat co
tinh cua » trinh cua, sinh cua, tinh chat
cua dung » cua dang, cua dong, qua dung
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (theo chieu)) xanh - hanh tinh cua dung cong van ((thuat cam) OR (thuat xay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (theo chieu)) xanh - hanh tinh cua dung cong van ((thuat cam) OR (thuat xay)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (theo chieu)) xanh - hanh tinh cua dung cong van ((thuat cam) OR (thuat xay))".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo chieu)) xanh - hanh tinh cua dung cong van ((thuat cam) OR (thuat xay))*.