Perhaps you should try some spelling variations:
cong thong » cong thuong, cong trong, dong thong
phan sinh » phan slinh, nhan sinh, phau sinh
thong van » trong van, thong va, thong quan
chieu ca » chieu cao, chieu day, nhieu cau
sinh phi » kinh phi, linh phi, sinh pho
phi cong » thi cong, phan cong, pham cong
van tang » van thang, van trang, van nang
hieu ca » hieu cac, hieu cua, hieu va
tang ca » tang cua, hang ca, tang ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu ca) OR (chieu ca)) - phan sinh phi cong thong van tang ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu ca) OR (chieu ca)) - phan sinh phi cong thong van tang ca".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu ca) OR (chieu ca)) - phan sinh phi cong thong van tang ca*.