Perhaps you should try some spelling variations:
tu tiengh » ta tieng, tu tinh, thu tieng
tu tieng » luc tieng, tu tuong, tu trong
hoc phan » hoc dan, hoc pho
phan hoa » phan loai, phan phoi, phan hong
phap van » pham van, phan van, phap han
va phap » va phat, ban phap
mo hoc » mon hoc, co hoc
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu tiengh) or (tu tieng)) hoc tap, nghien cuu mo hoc phan hoa hoc xa hoi va phap van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu tiengh) OR (tu tieng)) hoc tap, nghien cuu mo hoc phan hoa hoc xa hoi va phap van.
• Adding a wildcard symbol may retrieve word variants: ((tu tiengh) or (tu tieng)) hoc tap, nghien cuu mo hoc phan hoa hoc xa hoi va phap van*.