Perhaps you should try some spelling variations:
thang nguong » tang nguon, hang nguon, than nguon
hanh trung » thanh trung, hanh trang, manh trung
nguong dan » huong dan
hoc thieu » toc thieu, hoc hien
trung cap » truong cao, trung tam
cap thang » cau thang, cang thang, nam thang
than cau » toan cau, phan cau, than cap
doi chi » doi khi

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) or (doi chi)) xanh - hanh trung cap thang nguong dan ((than cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chi)) xanh - hanh trung cap thang nguong dan ((than cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chi)) xanh - hanh trung cap thang nguong dan ((than cau) or (phan tu))*.