Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
thai vung » thai cong, thai van
vung nhan » vung nhanh, dung nhan, luong nhan
thoi tai » thoi dai, hoi tai, phoi tai
cua tinh » cua sinh, va tinh, ha tinh
nhan van » nhan dan, nhan va, phan van
su cach » su sach, tu cach, su cac
cua tin » chua tinh, cua sinh, chuc tin
hoc tan » hoc tang, hoc dan, hoc tap
tan hoa » van hoa, tap hoa, tan ha
da thai » dao thai, do thai, ca thai
hoc da » hoc dan, hoc dai, hoc dat

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cach thoi tai, nghien ((cua tin) or (cua tinh)) hoc tan hoa hoc da thai vung nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach thoi tai, nghien ((cua tin) OR (cua tinh)) hoc tan hoa hoc da thai vung nhan van.
• Adding a wildcard symbol may retrieve word variants: su cach thoi tai, nghien ((cua tin) or (cua tinh)) hoc tan hoa hoc da thai vung nhan van*.