Perhaps you should try some spelling variations:
thanh dan » thanh san, thanh van, thanh dat
thong xu » thong tu, thong su, trong xu
hieu van » hieu va, thien van, lieu va
chang xu » chang xue, chao xu, chang ha
dan cua » dan ca, ban cua, dai cua
duc gia » quoc gia
nam duc » nam duoc, pham duc, nam thuc
te sach » toc sach
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu hoach)) ty ((chang xu) OR (thong xu)) ho. hieu van nam duc gia thanh dan cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu hoach)) ty ((chang xu) OR (thong xu)) ho. hieu van nam duc gia thanh dan cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu hoach)) ty ((chang xu) OR (thong xu)) ho. hieu van nam duc gia thanh dan cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu hoach)) ty ((chang xu) OR (thong xu)) ho. hieu van nam duc gia thanh dan cua te*.