Perhaps you should try some spelling variations:
tinh dai » trinh dai, tinh da, tinh hai
phu van » phuc van, chu van, phu san
cho hoc » co hoc, khoa hoc
hieu va » lieu va, hieu qua
cam duc » cao duc, pham duc, nam duoc
va tinh » may tinh
ho hoc » hoa hoc, hoi hoc, hoc hoc
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: phu van ky nang ((ho hoc) or (cho hoc)). hieu va ((cam duc) OR (cam xuc)) va tinh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: phu van ky nang ((ho hoc) OR (cho hoc)). hieu va ((cam duc) OR (cam xuc)) va tinh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "phu van ky nang ((ho hoc) or (cho hoc)). hieu va ((cam duc) OR (cam xuc)) va tinh dai cua te".
• Adding a wildcard symbol may retrieve word variants: phu van ky nang ((ho hoc) or (cho hoc)). hieu va ((cam duc) OR (cam xuc)) va tinh dai cua te*.